Hi @Laktech
You can use the previous version of PAD only if you have the executable of it and are able to install it.
Until then if it is causing too much trouble then you can copy the "If window" PAD actions into a Text file and replace it with the corresponding "If window contains" within the text file itself and then paste the replaced text back into the Flow editor. Do take a backup of the original flow or do it in a dummy flow.
For ex:
If you copy (Ctrl C) the "If window" action into notepad it shows as below
IF (UIAutomation.IfWindow.IsOpen Window: `some element here`) THEN
and "If window contains" as below
IF (UIAutomation.IfWindowContains.WindowContainsElement Element: `some element here`) THEN
Would be like a Find & Replace in one go versus having to do it manually within PAD at all places.