I mean 60$ there's must be worth a lot of mod, and after all cross save device it's kinda what? I still can use my old save without that cross save device. And so with help people on Reddit you can coding the game mechanics to work with your old save file, that's why I think it's not worth for me buying 60$.
If you think that cheating or hacking, you can check on Reddit there's a lot of tutoring about cross device on Visual novel game especially like yours and Renpy.