I tried to open the 9.5 project in Cubase 10.5 but couldn’t because it always crashed while loading mix console 
(So it is another story and I also searched some threads about this problem: Steinberg Forums)
I think GA was updated to SE 5 when I installed Cubase 10.5 for trial test.
And actually my mind was changed to wait Cubase 11.
I wonder if the only way to fix this is to uninstall all GA, Padshop completely and then reinstall it.