I really do hope you have not lost any data. Having worked in a computer shop and seen the heartache caused by lost data I tend to be very organised with backups and have multiple levels. I store all my scenes on a separate drive to the one that stores my content to try and avoid anything being over written with a new install or update. They are backed up locally to NAS storage, then to the cloud and finally to M-drives that are archival grade. If you you have data missing you could try a recovery program but they tend to work best on image and music files, still worth a try but get one that you can do a trial run and see if it recovers anything before you pay any money buying one.

Sorry I had other things going on, I would normally advised you do a back up before any install, not just for Poser, but for any install in general.

 

 

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.