diff --git a/TermTk/TTkUiTools/uiloader.py b/TermTk/TTkUiTools/uiloader.py
index 93a36b53..aca8e0f8 100644
--- a/TermTk/TTkUiTools/uiloader.py
+++ b/TermTk/TTkUiTools/uiloader.py
@@ -284,6 +284,14 @@ class TTkUiLoader():
 
         return widget
 
+    @staticmethod
+    def normalise(ui):
+        cb = {'1.0.0' : TTkUiLoader._convert_1_0_1_to_2_0_0,
+              '1.0.1' : TTkUiLoader._convert_1_0_1_to_2_0_0,
+              '2.0.0' : lambda x: x
+              }.get(ui['version'], lambda x: x)
+        return cb(ui)
+
     @staticmethod
     def loadDict(ui, baseWidget:TTkWidget=None, kwargs=None) -> TTkWidget:
         '''load the dictionary representing the ui definition of the widget
diff --git a/ttkDesigner/app/designer.py b/ttkDesigner/app/designer.py
index 4c7bea14..763cb40a 100644
--- a/ttkDesigner/app/designer.py
+++ b/ttkDesigner/app/designer.py
@@ -277,6 +277,7 @@ class TTkDesigner(TTkGridLayout):
 
         with open(fileName) as fp:
             dd = json.load(fp)
+            dd = TTkUiLoader.normalise(dd)
             sw = SuperWidget.loadDict(self, self._windowEditor.viewport(), dd['tui'])
             self._windowEditor.importSuperWidget(sw)
             self._sigslotEditor.importConnections(dd['connections'])
diff --git a/ttkDesigner/app/superobj/superwidget.py b/ttkDesigner/app/superobj/superwidget.py
index f9b3f059..7688e516 100644
--- a/ttkDesigner/app/superobj/superwidget.py
+++ b/ttkDesigner/app/superobj/superwidget.py
@@ -172,15 +172,19 @@ class SuperWidget(ttk.TTkContainer):
             sch = SuperWidget.loadDict(designer, parent, ch)
             if issubclass(type(sch),so.SuperLayout):
                 schl = sch
-            else:
+            elif issubclass(type(sch),so.SuperWidgetContainer):
                 schl = sch._superLayout
+            else:
+                schl = None
 
             if issubclass(type(sl),so.SuperLayoutGrid):
                 sl.layout().addWidget(sch,ch['row'],ch['col'],ch['rowspan'],ch['colspan'])
-                schl.setDropBorder(1)
+                if schl:
+                    schl.setDropBorder(1)
             else:
                 sl.layout().addWidget(sch)
-                schl.setDropBorder(0)
+                if schl:
+                    schl.setDropBorder(0)
         return sup
 
     def updateAll(self):