How do you transfer save files to the newest version? (From v3 to v6)
On Windows 10 desktop platform.
Sorry I'm late but maybe this will help.
Anything built in Renpy or a Renpy style engine will have their saves located in [game-version]/game/saves
Just move that "saves" folder into the same spot in the folder for the new version, click "yes" if it asks to replace a file.
Chances are high it won't have a save folder yet unless you've loaded the game up but that doesn't matter.