It’s a game built in Renpy so you’ll need to make a copy of the root folder if you want to keep seeding the original. Renpy will overwrite its files as you play, not just the save files. It’s just the way it is.

Check out https://www.emudeck.com/ if you are looking for emulation which is what I assume you are looking for but if not you can disregard

Bad news: nothing is really worth salvaging except maybe the HDD as a spare data drive but SSDs are cheap enough to warrant the upgrade and the TV (though a monitor would be better)

Good news: PCs aren’t that expensive right now and you can make a good build for even a cheaper budget. Check out this channel for more info https://youtube.com/playlist?list=PL30pfjH1BVN908ZV3QJRAakq-4mANnInm&si=Wth4bAzl_3uA5Mk-