itch.io

Usually with games what I do is take the "save" folder and move it to a temp folder on the desktop or somewhere, install the game and play a few minutes, then close the game, move the old save folder back over and overwrite the new installation save folder. next time the game is opened all your old saves are there.

For all Renpy games on PC and Mac, saves transfer automatically. Just open up the new version and your saves should be there. No need to overwrite any of the files.