Hi
I've been using Ver 4.2 with out issues. After a long wait, I've upgraded to 5.0 . The configuration import worked without error, however I've found the generation of support is inconsistent. Version 5 seems to leave large areas without support
I was having exactly the same issue - then made a discovery:
Whereas Vs 4 automatically adds supports in accordance with your chosen parameters, V5 does not.
If someone else can correct me, please do, but as far as I can see you have to go to the SUPPORT tab at the top of the screen and add supports automatically or whatever you want to do.
It took a little getting used to, and I believe works much better allowing more control. I frequently found the S3D would add supports in places where I knew they weren't needed so had to manually clean things up.