diff --git a/GP_guided_colorize/OP_create_empty_frames.py b/GP_guided_colorize/OP_create_empty_frames.py
index 79aa9b8..63d6c8b 100644
--- a/GP_guided_colorize/OP_create_empty_frames.py
+++ b/GP_guided_colorize/OP_create_empty_frames.py
@@ -57,7 +57,7 @@ class GP_OT_create_empty_frames(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object is not None and context.active_object.type == 'GPENCIL'
+        return context.active_object is not None and context.active_object.type == 'GREASEPENCIL'
 
     def invoke(self, context, event):
         # Possible preset with shortcut
diff --git a/GP_guided_colorize/OP_line_closer.py b/GP_guided_colorize/OP_line_closer.py
index 8ebcb0d..dc35af3 100644
--- a/GP_guided_colorize/OP_line_closer.py
+++ b/GP_guided_colorize/OP_line_closer.py
@@ -111,7 +111,7 @@ def create_gap_stroke(f, ob, tol=10, mat_id=None):
 
 def create_closing_line(tolerance=0.2):
     for ob in bpy.context.selected_objects:
-        if ob.type != 'GPENCIL':
+        if ob.type != 'GREASEPENCIL':
             continue
 
         mat_id = get_closeline_mat(ob)# get a the closing material
@@ -241,7 +241,7 @@ class GPSTK_OT_extend_lines(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object is not None and context.active_object.type == 'GPENCIL'
+        return context.active_object is not None and context.active_object.type == 'GREASEPENCIL'
 
     # mode : bpy.props.StringProperty(
     #     name="mode", description="Set mode for operator", default="render", maxlen=0, subtype='NONE', options={'ANIMATABLE'})
@@ -306,7 +306,7 @@ class GPSTK_OT_change_closeline_length(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object is not None and context.active_object.type == 'GPENCIL'
+        return context.active_object is not None and context.active_object.type == 'GREASEPENCIL'
 
     layer_tgt : bpy.props.EnumProperty(
         name="Extend layers", description="Choose which layer to target",
@@ -367,7 +367,7 @@ class GPSTK_OT_comma_finder(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.active_object is not None and context.active_object.type == 'GPENCIL'
+        return context.active_object is not None and context.active_object.type == 'GREASEPENCIL'
     
     def execute(self, context):
         ct = 0
@@ -397,7 +397,7 @@ class GPSTK_PT_line_closer_panel(bpy.types.Panel):
 
     @classmethod
     def poll(cls, context):
-        return (context.object is not None)# and context.object.type == 'GPENCIL'
+        return (context.object is not None)# and context.object.type == 'GREASEPENCIL'
 
     ## draw stuff inside the header (place before main label)
     # def draw_header(self, context):
@@ -414,7 +414,7 @@ class GPSTK_PT_line_closer_panel(bpy.types.Panel):
         layout.operator("gp.extend_close_lines", icon = 'SNAP_MIDPOINT')
         
         #diplay closeline visibility
-        if context.object.type == 'GPENCIL' and context.object.data.materials.get('closeline'):
+        if context.object.type == 'GREASEPENCIL' and context.object.data.materials.get('closeline'):
             row=layout.row()
             row.prop(context.object.data.materials['closeline'].grease_pencil, 'hide', text='Stop lines')
             row.operator("gp.change_close_lines_extension", text='Length', icon = 'DRIVER_DISTANCE')
diff --git a/OP_brushes.py b/OP_brushes.py
index d8db3ae..f24dcd5 100644
--- a/OP_brushes.py
+++ b/OP_brushes.py
@@ -27,7 +27,7 @@ class GPTB_OT_load_brushes(bpy.types.Operator, ImportHelper):
 
     # @classmethod
     # def poll(cls, context):
-    #     return context.object and context.object.type == 'GPENCIL'
+    #     return context.object and context.object.type == 'GREASEPENCIL'
 
     filename_ext = '.blend'
 
diff --git a/OP_copy_paste.py b/OP_copy_paste.py
index 48d86e2..cd64426 100644
--- a/OP_copy_paste.py
+++ b/OP_copy_paste.py
@@ -423,10 +423,10 @@ class GPCLIP_OT_copy_strokes(bpy.types.Operator):
     #copy = bpy.props.BoolProperty(default=True)
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
-        # if not context.object or not context.object.type == 'GPENCIL':
+        # if not context.object or not context.object.type == 'GREASEPENCIL':
         #     self.report({'ERROR'},'No GP object selected')
         #     return {"CANCELLED"}
 
@@ -452,10 +452,10 @@ class GPCLIP_OT_cut_strokes(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
-        # if not context.object or not context.object.type == 'GPENCIL':
+        # if not context.object or not context.object.type == 'GREASEPENCIL':
         #     self.report({'ERROR'},'No GP object selected')
         #     return {"CANCELLED"}
 
@@ -477,10 +477,10 @@ class GPCLIP_OT_paste_strokes(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
-        # if not context.object or not context.object.type == 'GPENCIL':
+        # if not context.object or not context.object.type == 'GREASEPENCIL':
         #     self.report({'ERROR'},'No GP object selected to paste on')
         #     return {"CANCELLED"}
         
@@ -510,7 +510,7 @@ class GPCLIP_OT_copy_multi_strokes(bpy.types.Operator):
     #copy = bpy.props.BoolProperty(default=True)
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     pressure : bpy.props.BoolProperty(name='pressure', default=True,
         description='Dump point pressure attribute (already skipped if at default value)')
@@ -633,7 +633,7 @@ class GPCLIP_OT_paste_multi_strokes(bpy.types.Operator):
     #copy = bpy.props.BoolProperty(default=True)
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         org_frame = context.scene.frame_current
diff --git a/OP_cursor_snap_canvas.py b/OP_cursor_snap_canvas.py
index 5c4a85c..3135233 100644
--- a/OP_cursor_snap_canvas.py
+++ b/OP_cursor_snap_canvas.py
@@ -13,7 +13,7 @@ class GPTB_OT_cusor_snap(bpy.types.Operator):
 
     # @classmethod
     # def poll(cls, context):
-    #     return context.object and context.object.type == 'GPENCIL'
+    #     return context.object and context.object.type == 'GREASEPENCIL'
 
     def invoke(self, context, event):
         #print('-!SNAP!-')
@@ -23,7 +23,7 @@ class GPTB_OT_cusor_snap(bpy.types.Operator):
         return {"FINISHED"}
 
     def execute(self, context):
-        if not context.object or context.object.type != 'GPENCIL':
+        if not context.object or context.object.type != 'GREASEPENCIL':
             self.report({'INFO'}, 'Not GP, Cursor surface project')
             bpy.ops.view3d.cursor3d('INVOKE_DEFAULT', use_depth=True, orientation='NONE')#'NONE', 'VIEW', 'XFORM', 'GEOM'
             return {"FINISHED"}
diff --git a/OP_file_checker.py b/OP_file_checker.py
index f652265..4253f7a 100755
--- a/OP_file_checker.py
+++ b/OP_file_checker.py
@@ -145,7 +145,7 @@ class GPTB_OT_file_checker(bpy.types.Operator):
 
         ## GP Use light disable
         if fix.set_gp_use_lights_off:
-            gp_with_lights = [o for o in context.scene.objects if o.type == 'GPENCIL' and o.use_grease_pencil_lights]
+            gp_with_lights = [o for o in context.scene.objects if o.type == 'GREASEPENCIL' and o.use_grease_pencil_lights]
             if gp_with_lights:
                 problems.append(f'Disable "Use Lights" on {len(gp_with_lights)} Gpencil objects')
                 if apply:
@@ -181,7 +181,7 @@ class GPTB_OT_file_checker(bpy.types.Operator):
         if fix.list_gp_mod_vis_conflict:
             mod_viz_ct = 0
             for o in context.scene.objects:
-                if o.type == 'GPENCIL':
+                if o.type == 'GREASEPENCIL':
                     for m in o.grease_pencil_modifiers:
                         if m.show_viewport != m.show_render:
                             vp = 'Yes' if m.show_viewport else 'No'
@@ -201,7 +201,7 @@ class GPTB_OT_file_checker(bpy.types.Operator):
 
         ## check if GP modifier have broken layer targets
         if fix.list_broken_mod_targets:
-            for o in [o for o in bpy.context.scene.objects if o.type == 'GPENCIL']:
+            for o in [o for o in bpy.context.scene.objects if o.type == 'GREASEPENCIL']:
                 lay_name_list = [l.info for l in o.data.layers]
                 for m in o.grease_pencil_modifiers:
                     if not hasattr(m, 'layer'):
@@ -277,7 +277,7 @@ class GPTB_OT_file_checker(bpy.types.Operator):
         #     problems.append(f"{fix_kf_type} GP onion skin filter to 'All type'")
 
         # for ob in context.scene.objects:#from object
-        #     if ob.type == 'GPENCIL':
+        #     if ob.type == 'GREASEPENCIL':
         #         ob.data.onion_keyframe_type = 'ALL'
 
         #### --- print fix/problems report
@@ -574,7 +574,7 @@ class GPTB_OT_list_modifier_visibility(bpy.types.Operator):
     def invoke(self, context, event):
         self.ob_list = []
         for o in context.scene.objects:
-            if o.type != 'GPENCIL':
+            if o.type != 'GREASEPENCIL':
                 continue
             if not len(o.grease_pencil_modifiers):
                 continue
@@ -612,7 +612,7 @@ class GPTB_OT_list_modifier_visibility(bpy.types.Operator):
     def invoke(self, context, event):
         self.ob_list = []
         for o in context.scene.objects:
-            if o.type == 'GPENCIL':
+            if o.type == 'GREASEPENCIL':
                 if not len(o.grease_pencil_modifiers):
                     continue
                 mods = []
diff --git a/OP_flat_reproject.py b/OP_flat_reproject.py
index c8eb260..b7d4ef3 100644
--- a/OP_flat_reproject.py
+++ b/OP_flat_reproject.py
@@ -119,11 +119,11 @@ class GPTB_OT_batch_flat_reproject(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         for o in context.selected_objects:
-            if o.type != 'GPENCIL' or not o.select_get():
+            if o.type != 'GREASEPENCIL' or not o.select_get():
                 continue
             batch_flat_reproject(o)
 
diff --git a/OP_follow_curve.py b/OP_follow_curve.py
index bdb5f0e..9c1e573 100644
--- a/OP_follow_curve.py
+++ b/OP_follow_curve.py
@@ -135,7 +135,7 @@ class GPTB_OT_go_to_object(bpy.types.Operator):
             bpy.ops.object.mode_set(mode='POSE', toggle=False)
             self.report({'INFO'}, f'Back to pose mode, {obj.name}')
         
-        elif obj.type == 'GPENCIL':
+        elif obj.type == 'GREASEPENCIL':
             bpy.ops.object.mode_set(mode='PAINT_GPENCIL', toggle=False)
         
         else:
diff --git a/OP_helpers.py b/OP_helpers.py
index c1e7238..dbb02f6 100644
--- a/OP_helpers.py
+++ b/OP_helpers.py
@@ -79,7 +79,7 @@ class GPTB_OT_rename_data_from_obj(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         if not self.rename_all:
@@ -93,7 +93,7 @@ class GPTB_OT_rename_data_from_obj(Operator):
         else:
             oblist = []
             for o in context.scene.objects:
-                if o.type == 'GPENCIL':
+                if o.type == 'GREASEPENCIL':
                     if o.name == o.data.name:
                         continue
                     oblist.append(f'{o.data.name} -> {o.name}')
@@ -250,7 +250,7 @@ class GPTB_OT_draw_cam(Operator):
                     drawcam.parent = act
                     vec = Vector((0,1,0))
 
-                    if act.type == 'GPENCIL':
+                    if act.type == 'GREASEPENCIL':
                         #change vector according to alignement
                         vec = get_gp_alignement_vector(context)
                     
@@ -427,15 +427,15 @@ class GPTB_OT_toggle_mute_animation(Operator):
             pool = context.scene.objects
 
         for o in pool:
-            if self.mode == 'GPENCIL' and o.type != 'GPENCIL':
+            if self.mode == 'GREASEPENCIL' and o.type != 'GREASEPENCIL':
                 continue
-            if self.mode == 'OBJECT' and o.type in ('GPENCIL', 'CAMERA'):
+            if self.mode == 'OBJECT' and o.type in ('GREASEPENCIL', 'CAMERA'):
                 continue
             if self.mode == 'CAMERA' and o.type != 'CAMERA':
                 continue
             
             # mute attribute animation for GP and cameras
-            if o.type in ('GPENCIL', 'CAMERA') and o.data.animation_data:
+            if o.type in ('GREASEPENCIL', 'CAMERA') and o.data.animation_data:
                 gp_act = o.data.animation_data.action
                 if gp_act:
                     print(f'\n---{o.name} data:')
@@ -473,7 +473,7 @@ class GPTB_OT_toggle_hide_gp_modifier(Operator):
         else:
             pool = context.scene.objects
         for o in pool:
-            if o.type != 'GPENCIL':
+            if o.type != 'GREASEPENCIL':
                 continue
             for m in o.grease_pencil_modifiers:
                 # skip modifier that are not visible in render
@@ -506,12 +506,12 @@ class GPTB_OT_list_disabled_anims(Operator):
             pool = context.scene.objects
 
         for o in pool:
-            # if self.skip_gp and o.type == 'GPENCIL':
+            # if self.skip_gp and o.type == 'GREASEPENCIL':
             #     continue
-            # if self.skip_obj and o.type != 'GPENCIL':
+            # if self.skip_obj and o.type != 'GREASEPENCIL':
             #     continue
 
-            if o.type == 'GPENCIL':
+            if o.type == 'GREASEPENCIL':
                 if o.data.animation_data:
                     gp_act = o.data.animation_data.action
                     if gp_act:
@@ -611,7 +611,7 @@ class GPTB_OT_clear_active_frame(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
     
     def execute(self, context):
         obj = context.object
@@ -644,7 +644,7 @@ class GPTB_OT_check_canvas_alignement(Operator):
     @classmethod
     def poll(cls, context):
         # if lock_axis is 'VIEW' then the draw axis is always aligned
-        return context.object and context.object.type == 'GPENCIL'# and context.scene.tool_settings.gpencil_sculpt.lock_axis != 'VIEW'
+        return context.object and context.object.type == 'GREASEPENCIL'# and context.scene.tool_settings.gpencil_sculpt.lock_axis != 'VIEW'
     
     def execute(self, context):
         if context.scene.tool_settings.gpencil_sculpt.lock_axis == 'VIEW':
@@ -673,7 +673,7 @@ class GPTB_OT_step_select_frames(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     start : bpy.props.IntProperty(name='Start Frame',
                                   description='Start frame of the step animation',
diff --git a/OP_key_duplicate_send.py b/OP_key_duplicate_send.py
index 6c1c915..aeb4fb1 100644
--- a/OP_key_duplicate_send.py
+++ b/OP_key_duplicate_send.py
@@ -40,8 +40,8 @@ class GPTB_OT_duplicate_send_to_layer(Operator) :
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'\
-            and context.space_data.bl_rna.identifier == 'SpaceDopeSheetEditor' and context.space_data.ui_mode == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'\
+            and context.space_data.bl_rna.identifier == 'SpaceDopeSheetEditor' and context.space_data.ui_mode == 'GREASEPENCIL'
 
     # history : bpy.props.StringProperty(default='', options={'SKIP_SAVE'}) # need to have a variable to store (to get it in self)
 
@@ -131,7 +131,7 @@ def unregister_keymaps():
 
 
 def menu_duplicate_and_send_to_layer(self, context):
-    if context.space_data.ui_mode == 'GPENCIL':
+    if context.space_data.ui_mode == 'GREASEPENCIL':
         self.layout.operator_context = 'INVOKE_REGION_WIN'
         self.layout.operator('gp.duplicate_send_to_layer', text='Move Keys To Layer').delete_source = True
         self.layout.operator('gp.duplicate_send_to_layer', text='Copy Keys To Layer')
diff --git a/OP_keyframe_jump.py b/OP_keyframe_jump.py
index 1b5fa20..7d1484e 100644
--- a/OP_keyframe_jump.py
+++ b/OP_keyframe_jump.py
@@ -10,7 +10,7 @@ class GPTB_OT_jump_gp_keyframe(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     next : BoolProperty(
         name="Next GP keyframe", description="Go to next active GP keyframe", 
diff --git a/OP_layer_manager.py b/OP_layer_manager.py
index fc31069..73fd7e2 100644
--- a/OP_layer_manager.py
+++ b/OP_layer_manager.py
@@ -261,9 +261,9 @@ def build_layers_targets_from_dopesheet(context):
 
 
     if dopeset.show_only_selected:
-        pool = [o for o in context.selected_objects if o.type == 'GPENCIL']
+        pool = [o for o in context.selected_objects if o.type == 'GREASEPENCIL']
     else:
-        pool = [o for o in context.scene.objects if o.type == 'GPENCIL']
+        pool = [o for o in context.scene.objects if o.type == 'GREASEPENCIL']
         if not dopeset.show_hidden:
             pool = [o for o in pool if o.visible_get()]
 
@@ -292,7 +292,7 @@ class GPTB_OT_select_set_same_prefix(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     mode : EnumProperty(default='SELECT', options={'SKIP_SAVE'},
         items=(
@@ -380,7 +380,7 @@ class GPTB_OT_select_set_same_color(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     mode : EnumProperty(default='SELECT', options={'SKIP_SAVE'},
         items=(
@@ -507,7 +507,7 @@ class GPTB_OT_rename_gp_layer(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     find: StringProperty(name="Find", description="Name to replace", default="", maxlen=0, options={'ANIMATABLE'}, subtype='NONE')
     replace: StringProperty(name="Repl", description="New name placed", default="", maxlen=0, options={'ANIMATABLE'}, subtype='NONE')
@@ -633,7 +633,7 @@ def gpencil_dopesheet_header(self, context):
     '''to append in DOPESHEET_HT_header'''
     layout = self.layout
     st = context.space_data
-    if st.mode != 'GPENCIL':
+    if st.mode != 'GREASEPENCIL':
         return
 
     row = layout.row(align=True)
@@ -653,7 +653,7 @@ def gpencil_layer_dropdown_menu(self, context):
 def obj_layer_name_callback():
     '''assign layer name properties so user an tweak it'''
     ob = bpy.context.object
-    if not ob or ob.type != 'GPENCIL':
+    if not ob or ob.type != 'GREASEPENCIL':
         return
     if not ob.data.layers.active:
         return
@@ -736,7 +736,7 @@ class GPTB_OT_add_gp_layer_with_rename(Operator):
     bl_options = {"REGISTER", "UNDO"}
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         add_layer(context)
@@ -750,7 +750,7 @@ class GPTB_OT_add_gp_layer(Operator):
     bl_options = {"REGISTER", "UNDO"}
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         add_layer(context)
diff --git a/OP_layer_picker.py b/OP_layer_picker.py
index d4e46f3..675506b 100644
--- a/OP_layer_picker.py
+++ b/OP_layer_picker.py
@@ -14,7 +14,7 @@ class GP_OT_pick_closest_layer(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL' and context.mode == 'PAINT_GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL' and context.mode == 'PAINT_GPENCIL'
 
     stroke_filter : bpy.props.EnumProperty(name='Target',
         default='STROKE',
diff --git a/OP_material_move_to_layer.py b/OP_material_move_to_layer.py
index 03addb1..57f7b8d 100644
--- a/OP_material_move_to_layer.py
+++ b/OP_material_move_to_layer.py
@@ -39,7 +39,7 @@ class GPTB_OT_move_material_to_layer(Operator) :
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def invoke(self, context, event):
         if self.layer_name:
@@ -82,7 +82,7 @@ class GPTB_OT_move_material_to_layer(Operator) :
             return {'CANCELLED'}
 
         ## Active + selection
-        pool = [o for o in bpy.context.selected_objects if o.type == 'GPENCIL']
+        pool = [o for o in bpy.context.selected_objects if o.type == 'GREASEPENCIL']
         if not context.object in pool:
             pool.append(context.object)
 
@@ -165,7 +165,7 @@ class GPTB_OT_move_material_to_layer(Operator) :
 
 
 # def menu_duplicate_and_send_to_layer(self, context):
-#     if context.space_data.ui_mode == 'GPENCIL':
+#     if context.space_data.ui_mode == 'GREASEPENCIL':
 #         self.layout.operator_context = 'INVOKE_REGION_WIN'
 #         self.layout.operator('gp.duplicate_send_to_layer', text='Move Keys To Layer').delete_source = True
 #         self.layout.operator('gp.duplicate_send_to_layer', text='Copy Keys To Layer')
diff --git a/OP_material_picker.py b/OP_material_picker.py
index f78b6c5..e7d9ea5 100644
--- a/OP_material_picker.py
+++ b/OP_material_picker.py
@@ -33,7 +33,7 @@ class GP_OT_pick_closest_material(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL' and context.mode == 'PAINT_GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL' and context.mode == 'PAINT_GPENCIL'
 
     fill_only : bpy.props.BoolProperty(default=False, options={'SKIP_SAVE'})
 
@@ -159,7 +159,7 @@ class GP_OT_pick_closest_material(Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL' and context.mode == 'PAINT_GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL' and context.mode == 'PAINT_GPENCIL'
 
     # fill_only : bpy.props.BoolProperty(default=False, options={'SKIP_SAVE'})
     stroke_filter : bpy.props.EnumProperty(default='FILL',
diff --git a/OP_palettes.py b/OP_palettes.py
index 8c64d0a..f69aff7 100644
--- a/OP_palettes.py
+++ b/OP_palettes.py
@@ -42,7 +42,7 @@ class GPTB_OT_load_default_palette(bpy.types.Operator):
     # path_to_pal : bpy.props.StringProperty(name="paht to palette", description="path to the palette", default="")
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         # Start Clean (delete unuesed sh*t)
@@ -82,7 +82,7 @@ class GPTB_OT_load_palette(bpy.types.Operator, ImportHelper):
     # path_to_pal : bpy.props.StringProperty(name="paht to palette", description="path to the palette", default="")
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     filename_ext = '.json'
 
@@ -110,7 +110,7 @@ class GPTB_OT_save_palette(bpy.types.Operator, ExportHelper):
     # path_to_pal : bpy.props.StringProperty(name="paht to palette", description="path to the palette", default="")
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     filter_glob: bpy.props.StringProperty(default='*.json', options={'HIDDEN'})#*.jpg;*.jpeg;*.png;*.tif;*.tiff;*.bmp
     
@@ -169,7 +169,7 @@ def load_blend_palette(context, filepath):
 
     print(f'-- import palette from : {filepath} --')
     for ob in context.selected_objects:
-        if ob.type != 'GPENCIL':
+        if ob.type != 'GREASEPENCIL':
             print(f'{ob.name} not a GP object')
             continue
 
@@ -224,7 +224,7 @@ class GPTB_OT_load_blend_palette(bpy.types.Operator, ImportHelper):
     # path_to_pal : bpy.props.StringProperty(name="paht to palette", description="path to the palette", default="")
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     filename_ext = '.blend'
 
@@ -252,7 +252,7 @@ class GPTB_OT_copy_active_to_selected_palette(bpy.types.Operator):
     # path_to_pal : bpy.props.StringProperty(name="paht to palette", description="path to the palette", default="")
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def execute(self, context):
         ob = context.object
@@ -260,7 +260,7 @@ class GPTB_OT_copy_active_to_selected_palette(bpy.types.Operator):
             self.report({'ERROR'}, 'No materials to transfer')
             return {"CANCELLED"}
 
-        selection = [o for o in context.selected_objects if o.type == 'GPENCIL' and o != ob]
+        selection = [o for o in context.selected_objects if o.type == 'GREASEPENCIL' and o != ob]
 
         if not selection:
             self.report({'ERROR'}, 'Need to have other Grease pencil objects selected to receive active object materials')
@@ -313,7 +313,7 @@ class GPTB_OT_clean_material_stack(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     def invoke(self, context, event):
         self.ob = context.object
@@ -354,7 +354,7 @@ class GPTB_OT_clean_material_stack(bpy.types.Operator):
         import re
         diff_ct = 0
         todel = []
-        if ob.type != 'GPENCIL':
+        if ob.type != 'GREASEPENCIL':
             return
         if not hasattr(ob, 'material_slots'):
             return
diff --git a/OP_palettes_linker.py b/OP_palettes_linker.py
index 46c2093..bd0d85a 100644
--- a/OP_palettes_linker.py
+++ b/OP_palettes_linker.py
@@ -45,7 +45,7 @@ class GPTB_OT_import_obj_palette(Operator):
 
     def execute(self, context):
         ## get targets
-        selection = [o for o in context.selected_objects if o.type == 'GPENCIL']
+        selection = [o for o in context.selected_objects if o.type == 'GREASEPENCIL']
         if not selection:
             self.report({'ERROR'}, 'Need to have at least one GP object selected in scene')
             return {"CANCELLED"}
@@ -98,7 +98,7 @@ class GPTB_OT_import_obj_palette(Operator):
             return {"CANCELLED"}    
         
         for i in range(len(linked_objs))[::-1]: #  reversed(range(len(l))) / range(len(l))[::-1]
-            if linked_objs[i].type != 'GPENCIL':
+            if linked_objs[i].type != 'GREASEPENCIL':
                 print(f'{linked_objs[i].name} type is "{linked_objs[i].type}"')
                 bpy.data.objects.remove(linked_objs.pop(i))
 
diff --git a/OP_realign.py b/OP_realign.py
index 2016b6c..9f74ebf 100644
--- a/OP_realign.py
+++ b/OP_realign.py
@@ -267,7 +267,7 @@ class GPTB_OT_realign(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
 
     reproject : bpy.props.BoolProperty(
         name='Reproject', default=True,
@@ -365,7 +365,7 @@ class GPTB_OT_batch_reproject_all_frames(bpy.types.Operator):
 
     @classmethod
     def poll(cls, context):
-        return context.object and context.object.type == 'GPENCIL'
+        return context.object and context.object.type == 'GREASEPENCIL'
     
     all_strokes : bpy.props.BoolProperty(
         name='All Strokes', default=True,
diff --git a/UI_tools.py b/UI_tools.py
index b9d5fe6..400cbc0 100644
--- a/UI_tools.py
+++ b/UI_tools.py
@@ -144,7 +144,7 @@ class GPTB_PT_sidebar_panel(Panel):
         col.prop(context.scene.gptoolprops, 'keyframe_type', text='Jump On') # Keyframe Jump
         # col.prop(context.space_data.overlay, 'use_gpencil_onion_skin') # not often used
         
-        if context.object and context.object.type == 'GPENCIL':
+        if context.object and context.object.type == 'GREASEPENCIL':
             # col.prop(context.object.data, 'use_autolock_layers') # not often used
             col.prop(context.object, 'show_in_front') # text='In Front' 
 
@@ -191,23 +191,23 @@ class GPTB_PT_anim_manager(Panel):
         # import time
         # t0 = time.perf_counter()
 
-        # objs = [o for o in context.scene.objects if o.type not in ('GPENCIL', 'CAMERA')]
-        # gps = [o for o in context.scene.objects if o.type == 'GPENCIL']
+        # objs = [o for o in context.scene.objects if o.type not in ('GREASEPENCIL', 'CAMERA')]
+        # gps = [o for o in context.scene.objects if o.type == 'GREASEPENCIL']
         # cams = [o for o in context.scene.objects if o.type == 'CAMERA']
         objs = []
         gps = []
         cams = []
         for o in context.scene.objects:
-            if o.type not in ('GPENCIL', 'CAMERA'):
+            if o.type not in ('GREASEPENCIL', 'CAMERA'):
                 objs.append(o)
-            elif o.type == 'GPENCIL':
+            elif o.type == 'GREASEPENCIL':
                 gps.append(o)
             elif o.type == 'CAMERA':
                 cams.append(o)
 
         # print(f'{time.perf_counter() - t0:.8f}s')
 
-        return {'OBJECT': objs, 'GPENCIL': gps, 'CAMERA': cams}
+        return {'OBJECT': objs, 'GREASEPENCIL': gps, 'CAMERA': cams}
 
 
     def draw(self, context):
@@ -221,7 +221,7 @@ class GPTB_PT_anim_manager(Panel):
         col.operator('gp.list_disabled_anims')
 
         ## Show Enable / Disable anims
-        for cat, cat_type in [('Obj anims:', 'OBJECT'), ('Cam anims:', 'CAMERA'), ('Gp anims:', 'GPENCIL')]:
+        for cat, cat_type in [('Obj anims:', 'OBJECT'), ('Cam anims:', 'CAMERA'), ('Gp anims:', 'GREASEPENCIL')]:
             on_icon, off_icon = anim_status(obj_types[cat_type])
 
             subcol = col.column()
@@ -242,7 +242,7 @@ class GPTB_PT_anim_manager(Panel):
 
         row = subcol.row(align=True)
         row.label(text='Gp modifiers:')
-        on_icon, off_icon = gp_modifier_status(obj_types['GPENCIL'])
+        on_icon, off_icon = gp_modifier_status(obj_types['GREASEPENCIL'])
         # subcol.alert = off_icon == 'LAYER_ACTIVE' # Turn red
         row.operator('gp.toggle_hide_gp_modifier', text='ON', icon=on_icon).show = True
         row.operator('gp.toggle_hide_gp_modifier', text='OFF', icon=off_icon).show = False
@@ -734,7 +734,7 @@ def interpolate_header_ui(self, context):
     layout = self.layout
     obj = context.active_object
 
-    if obj and obj.type == 'GPENCIL' and context.gpencil_data:
+    if obj and obj.type == 'GREASEPENCIL' and context.gpencil_data:
         gpd = context.gpencil_data
     else:
         return
diff --git a/__init__.py b/__init__.py
index 59b3dbb..d71a6bd 100755
--- a/__init__.py
+++ b/__init__.py
@@ -4,8 +4,8 @@ bl_info = {
 "name": "GP toolbox",
 "description": "Tool set for Grease Pencil in animation production",
 "author": "Samuel Bernou, Christophe Seux",
-"version": (3, 3, 0),
-"blender": (4, 0, 0),
+"version": (4, 0, 0),
+"blender": (4, 3, 0),
 "location": "Sidebar (N menu) > Gpencil > Toolbox / Gpencil properties",
 "warning": "",
 "doc_url": "https://git.autourdeminuit.com/autour_de_minuit/gp_toolbox",
diff --git a/properties.py b/properties.py
index 10cb2f2..31b7a1b 100755
--- a/properties.py
+++ b/properties.py
@@ -21,7 +21,7 @@ def update_layer_name(self, context):
     if not self.layer_name:
         # never replace by nothing (since there should be prefix/suffix)
         return
-    if not context.object or context.object.type != 'GPENCIL':
+    if not context.object or context.object.type != 'GREASEPENCIL':
         return
     if not context.object.data.layers.active:
         return
diff --git a/utils.py b/utils.py
index 05914ea..f796462 100644
--- a/utils.py
+++ b/utils.py
@@ -372,24 +372,24 @@ def create_gp_palette(gp_data_block,info) :
 
 def get_gp_objects(selection=True):
     '''return selected objects or only the active one'''
-    if not bpy.context.active_object or bpy.context.active_object.type != 'GPENCIL':
+    if not bpy.context.active_object or bpy.context.active_object.type != 'GREASEPENCIL':
         print('No active GP object')
         return []
     
     active = bpy.context.active_object
     if selection:
-        selection = [o for o in bpy.context.selected_objects if o.type == 'GPENCIL']
+        selection = [o for o in bpy.context.selected_objects if o.type == 'GREASEPENCIL']
         if not active in selection:
             selection += [active]
         return selection
 
-    if bpy.context.active_object and bpy.context.active_object.type == 'GPENCIL':
+    if bpy.context.active_object and bpy.context.active_object.type == 'GREASEPENCIL':
         return [active]
     return []
 
 def get_gp_datas(selection=True):
     '''return selected objects or only the active one'''
-    if not bpy.context.active_object or bpy.context.active_object.type != 'GPENCIL':
+    if not bpy.context.active_object or bpy.context.active_object.type != 'GREASEPENCIL':
         print('No active GP object')
         return []
     
@@ -397,15 +397,15 @@ def get_gp_datas(selection=True):
     if selection:
         selected = []
         for o in bpy.context.selected_objects:
-            if o.type == 'GPENCIL':
+            if o.type == 'GREASEPENCIL':
                 if o.data not in selected:
                     selected.append(o.data)
-        # selected = [o.data for o in bpy.context.selected_objects if o.type == 'GPENCIL']
+        # selected = [o.data for o in bpy.context.selected_objects if o.type == 'GREASEPENCIL']
         if not active_data in selected:
             selected += [active_data]
         return selected
 
-    if bpy.context.active_object and bpy.context.active_object.type == 'GPENCIL':
+    if bpy.context.active_object and bpy.context.active_object.type == 'GREASEPENCIL':
         return [active_data]
     
     print('EOL. No active GP object')
@@ -1206,7 +1206,7 @@ def all_anim_enabled(objects) -> bool:
                 if fcu.mute:
                     return False
         
-        if o.type in ('GPENCIL', 'CAMERA'):
+        if o.type in ('GREASEPENCIL', 'CAMERA'):
             if o.data.animation_data and o.data.animation_data.action:
                 ## Check if object data attributes fcurves are muted
                 for fcu in o.animation_data.action.fcurves:
@@ -1219,7 +1219,7 @@ def all_anim_enabled(objects) -> bool:
 def all_object_modifier_enabled(objects) -> bool:
     '''Return False if one modifier of one object has GP modifier disabled in viewport but enabled in render'''
     for o in objects:
-        if o.type != 'GPENCIL':
+        if o.type != 'GREASEPENCIL':
             continue
         for m in o.grease_pencil_modifiers:
             if m.show_render and not m.show_viewport:
@@ -1247,7 +1247,7 @@ def has_fully_enabled_anim(o):
             if fcu.mute:
                 return False
 
-    if o.type in ('GPENCIL', 'CAMERA'):
+    if o.type in ('GREASEPENCIL', 'CAMERA'):
         if o.data.animation_data and o.data.animation_data.action:
             ## Check if object data attributes fcurves are muted
             for fcu in o.animation_data.action.fcurves:
@@ -1292,7 +1292,7 @@ def anim_status(objects) -> tuple((str, str)):
                     on_count += 1
                 count += 1
 
-        if o.type in ('GPENCIL', 'CAMERA'):
+        if o.type in ('GREASEPENCIL', 'CAMERA'):
             datablock = o.data
             if datablock.animation_data is None:
                 continue
@@ -1320,7 +1320,7 @@ def gp_modifier_status(objects) -> tuple((str, str)):
     '''return icons on/off tuple'''
     on_count = off_count = count = 0
     for o in objects:
-        if o.type != 'GPENCIL':
+        if o.type != 'GREASEPENCIL':
             continue
         ## Skip hided object
         if o.hide_get() and o.hide_render: