0.9.7!

[[Unknown]]

Well, the save files are actually encrypted differently (I don't know much about that part), you could potentially override the sdk version on your iso to match what PPSSPP thought it was before. Probably the easiest way would be a cheat code instead.

Unfortunately, I don't have the Final Mix version to explain how exactly, but the game should have something looking like this near the very start of its assembly (if you disable "Run on Load" and show the disassembly):

jal zz_sceKernelSetSdkVersion603_605
ori a0, a0, 0x10

Changing that second instruction (highlight it and press Ctrl-A) to "li a0, 0" would do the trick. Whatever address that is, a cheat code be made that sets that address to 0 automatically, I think.

-[Unknown]