For most Windows Ren'py games, the save location for the game is actually Name of game\game\saves. The appdata location is for backing up. However, if you clean out the appdata, you won't find the game saves there. You can find the saves between version, if you delete old games, but not all the saves, and they pop in game between versions. For some games, this is not a good thing, as there are too many changes made to make those old saves viable, anymore. And they do warn about using old save. So, for most games, I start a fresh game, just so that I can get a decent save at the end.