I did a clean install for the Gave Dev versions which I have been using since launch I have not noticed any problems.  The raytrace preview appears to be faster buth thta could be my imagination, certainly it does not crash as often as Poser pro 2014 did.

If you have a Pro 2014 installaltion which is not updated then I can see you might like to keep it as a fall back.  If it is updated to the new service pack then I can't see it is a fall back as they are basically the same thing as Game Dev is built on top of the new service release.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.