Rigify: force reloading rigs to prune the last deleted feature set.

rigify/__init__.py

@@ -127,14 +127,14 @@ class RigifyPreferences(AddonPreferences):
 
             register()
 
-    def update_external_rigs(self):
+    def update_external_rigs(self, force=False):
         """Get external feature sets"""
         if self.legacy_mode:
             return
 
         set_list = feature_set_list.get_installed_list()
 
-        if len(set_list) > 0:
+        if force or len(set_list) > 0:
             # Reload rigs
             print('Reloading external rigs...')
             rig_lists.get_external_rigs(set_list)

rigify/feature_set_list.py

@@ -221,7 +221,7 @@ class DATA_OT_rigify_remove_feature_set(bpy.types.Operator):
             if os.path.exists(set_path):
                 rmtree(set_path)
 
-        addon_prefs.update_external_rigs()
+        addon_prefs.update_external_rigs(force=True)
         return {'FINISHED'}
 
 def register():