check list for file

1.5.1

- fix: eraser brush
- change: check file has custom check list in addon prefs

UI_tools.py

@@ -303,10 +303,12 @@ class GPTB_PT_render(bpy.types.Panel):
         row.operator('render.use_active_object_name', text = '', icon='OUTLINER_DATA_GP_LAYER')#icon = 'OUTPUT'
 
         layout.operator('render.setup_render_path', text = 'Setup output', icon = 'TOOL_SETTINGS')#SETTINGS
-         
-        blend = Path(bpy.data.filepath)
-        out = blend.parents[1] / "compo" / "base"
-        layout.operator("wm.path_open", text='Open render folder', icon='FILE_FOLDER').filepath = str(out)
+        
+        blend = bpy.data.filepath
+        if blend:
+            blend = Path(blend)
+            out = blend.parents[1] / "compo" / "base"
+            layout.operator("wm.path_open", text='Open render folder', icon='FILE_FOLDER').filepath = str(out)