diff -r c89fc366bebd -r 0ffb41625592 dialogs/ConnectionDialog.py
--- a/dialogs/ConnectionDialog.py	Thu Sep 02 21:36:29 2021 +0200
+++ b/dialogs/ConnectionDialog.py	Thu Sep 02 22:18:14 2021 +0200
@@ -59,7 +59,7 @@
 
         # Create label for connection type
         type_label = wx.StaticText(self, label=_('Type:'))
-        self.LeftGridSizer.AddWindow(type_label, flag=wx.GROW)
+        self.LeftGridSizer.Add(type_label, flag=wx.GROW)
 
         # Create radio buttons for selecting connection type
         self.TypeRadioButtons = {}
@@ -70,27 +70,27 @@
                                           style=(wx.RB_GROUP if first else 0))
             radio_button.SetValue(first)
             self.Bind(wx.EVT_RADIOBUTTON, self.OnTypeChanged, radio_button)
-            self.LeftGridSizer.AddWindow(radio_button, flag=wx.GROW)
+            self.LeftGridSizer.Add(radio_button, flag=wx.GROW)
             self.TypeRadioButtons[type] = radio_button
             first = False
 
         # Create label for connection name
         name_label = wx.StaticText(self, label=_('Name:'))
-        self.LeftGridSizer.AddWindow(name_label, flag=wx.GROW)
+        self.LeftGridSizer.Add(name_label, flag=wx.GROW)
 
         # Create text control for defining connection name
         self.ConnectionName = wx.TextCtrl(self)
         self.ConnectionName.SetMinSize(wx.Size(200, -1))
         self.Bind(wx.EVT_TEXT, self.OnNameChanged, self.ConnectionName)
-        self.LeftGridSizer.AddWindow(self.ConnectionName, flag=wx.GROW)
+        self.LeftGridSizer.Add(self.ConnectionName, flag=wx.GROW)
 
         # Add preview panel and associated label to sizers
         self.Preview.SetMinSize(wx.Size(-1, 100))
-        self.LeftGridSizer.AddWindow(self.PreviewLabel, flag=wx.GROW)
-        self.LeftGridSizer.AddWindow(self.Preview, flag=wx.GROW)
+        self.LeftGridSizer.Add(self.PreviewLabel, flag=wx.GROW)
+        self.LeftGridSizer.Add(self.Preview, flag=wx.GROW)
 
         # Add buttons sizer to sizers
-        self.MainSizer.AddSizer(
+        self.MainSizer.Add(
             self.ButtonSizer, border=20,
             flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)
         self.ColumnSizer.RemoveSizer(self.RightGridSizer)
@@ -99,10 +99,10 @@
         # of POU
         if apply_button:
             self.ApplyToAllButton = wx.Button(self, label=_("Propagate Name"))
-            self.ApplyToAllButton.SetToolTipString(
+            self.ApplyToAllButton.SetToolTip(
                 _("Apply name modification to all continuations with the same name"))
             self.Bind(wx.EVT_BUTTON, self.OnApplyToAll, self.ApplyToAllButton)
-            self.ButtonSizer.AddWindow(self.ApplyToAllButton, flag=wx.LEFT)
+            self.ButtonSizer.Add(self.ApplyToAllButton, flag=wx.LEFT)
         else:
             self.ConnectionName.ChangeValue(
                 controller.GenerateNewName(