- fixed the setting color functionality on right click on the objects in the Project Tab such that the set color (or opacity) it is stored in a persistent setting correctly and the colors for Gerber objects are restored in order

- trying to fix a Runtime exception that may happen when the Plugin Tab is deleted completely

appPlugins/ToolPaint.py

@@ -14,7 +14,7 @@ from copy import deepcopy
 from appParsers.ParseGerber import Gerber
 from camlib import Geometry, FlatCAMRTreeStorage, grace
 from appGUI.GUIElements import FCTable, FCDoubleSpinner, FCCheckBox, FCInputDoubleSpinner, RadioSet, \
-    FCButton, FCComboBox, FCLabel, FCComboBox2
+    FCButton, FCComboBox, FCLabel, FCComboBox2, VerticalScrollArea
 
 from shapely.geometry import base, Polygon, MultiPolygon, LinearRing, Point
 from shapely.ops import unary_union, linemerge
@@ -171,7 +171,17 @@ class ToolPaint(AppTool, Gerber):
                     break
             # show the Tab
             if not found_idx:
-                self.app.ui.notebook.addTab(self.app.ui.plugin_tab, _("Plugin"))
+                try:
+                    self.app.ui.notebook.addTab(self.app.ui.plugin_tab, _("Plugin"))
+                except RuntimeError:
+                    self.app.ui.plugin_tab = QtWidgets.QWidget()
+                    self.app.ui.plugin_tab.setObjectName("plugin_tab")
+                    self.app.ui.plugin_tab_layout = QtWidgets.QVBoxLayout(self.app.ui.plugin_tab)
+                    self.app.ui.plugin_tab_layout.setContentsMargins(2, 2, 2, 2)
+
+                    self.app.ui.plugin_scroll_area = VerticalScrollArea()
+                    self.app.ui.plugin_tab_layout.addWidget(self.app.ui.plugin_scroll_area)
+                    self.app.ui.notebook.addTab(self.app.ui.plugin_tab, _("Plugin"))
                 # focus on Tool Tab
                 self.app.ui.notebook.setCurrentWidget(self.app.ui.plugin_tab)