Originally posted by Audioboxer
Possibly, however, I've been copying saves from 4.7x on this site onto a PS4 with 5.05. Or does SaveWizard convert it to a 5.05 save when its resigning?
It doesn't seem to, no. My Bloodborne save was from a 4.xx FW, and I had to actually load it in the game, save it, copy the updated save to my USB stick, then import it into Save Wizard.
Honestly, I think it's just a thing with Save Wizard saying no, even thought 5.50 saves should be fine. Hopefully Sony didn't change anything else. There's nothing really going on hacking-wise that warrants changing up savedata.