when I save a file as stp in the Creo view 4.1, it changed the parts automatically. LH picture shows my original file structure the RH picture is what I saved in the 4.1.
No this issue in the creo view 3.0 before.
I am not sure if this is what you are talking about with the file changing names:
If it is, my work around is selecting the type of file (.stp) and then entering the name.
The pictures didn't show up for me until after I posted. It doesn't look like this is your issue.