>>46051575The dev said it might be possible, but unlikely. What you're supposed to do is:
1) Save your game (not with save states, but with the in-game save)
2) Do the same steps with Lunar IPS I told you about previously to make an up-to-date Quarantine Crystal ROM
3) Rename the up-to-date ROM to something other than what you named the old ROM
4) Move the up-to-date ROM into the same folder as your old ROM
5) Locate the old ROM's .sav file. It should be in the same folder as the old ROM
6) Rename the old ROM's .sav file to whatever the new Quarantine Crystal ROM is named
7) Boot the game and see what happens.
If it doesn't work, then you're outta luck. You can still keep the .sav file with your bros by renaming it back to what the old ROM was named, but if you want to play the up-to-date version, you'll have to start a new game.