I don't really know if this is a bug or whatnot but when I transferred a save file and loaded it, once I clicked on Skill Masteries, It crashes my game and shows an error message saying : Script 'skill replacement' line 45: NoMethodError occurred, Undefined method 'include?' for:NilClass.
you have to restart on a new save.
Out of curiosity, what causes these saves to break so often? Is it something to do with the game maker system you use?
Fairly simple. Scripts contains global variables. When you load a save file from a older version, when that global variable isn't located. It crashes.
And the only way to memorize that global variable is to start a new game.
Also, save system MLP RPG uses is dynamic; the best save system out there that allows FULL infinite amount of game customization, but the down side would be it is hard to make patches compatible without wasting ton of time on it.