Narrowed to a TableView and renamed var's, copied/pasted methods/objects and eliminated the 'hard' crash.
I recognize larger projects combining small Creo projects with dragndrop and duplicating windows, etc. will sometimes cause corruption for some of the files but if possible a crash log to identify the fault would be a great help.
Creo typically is very stable and the new version is quite fast.
The search tool is very useful when duplicating but even better if it can be expanded to include a replace tool as well.
Keep up the good work !