I'm completely out of ideas so I'd really appreciate any help with this. I'll try and make it short...
I have a PSP Slim running GEN 5.50-D3 and Prometheus 4. I bought Dissidia on UMD but soon realised it wanted a FW upgrade, so in an attempt at a quick fix I changed version.txt to 6.35. It actually worked and Dissidia was running perfectly.
I later notice that all my save files are showing as corrupt. I've tried Luca00555's fix and another called Fix v3 (I believe it just switches peagasus.prx to that of GEN-D2). The latter of the two allows me to load my game saves, but I can't start (error 80020148) any newish games, including 3rd Birthday which was working fine before any of this happened.
I've also reformatted my memory card and reinstalled GEN and Prometheus with no luck.