That's no excuse.
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It's a pretty decent explanation to the question and thanks so much for cutting this one part out of the whole contex.
I'm a gamer not a programmer. From my many years of experience with games from this site I can safely say that if the engine is Ren'Py then it will store saves in your "hidden by default" AppData folder, almost always.
If it's not, then you'll have to check how a particular Dev setup the particular engine to store saves.
The good thing about Ren'Py's automatic hidden saves is you can delete games and still have your saves stored, the bad thing comes when you have to locate them for some reason.. Personally I had to spend a lot of time learning how to unhide AppData on my OS when getting a new PC, also when that came with a new OS
IMO the more automated stuff becomes, the more lazy we get and that leads to all sorts of trouble.
This game does not use AppData saves and I find it a good thing!
It makes it possible for You to back-up your saves and store them on a location of Your choosing, even a portable drive like a stickdrive, so you can transfer the saves easy on another computer, or even share them if you so wish.
The RPG Maker games I've played uses the same system for saves storage, so I can safely say than in most cases if it's RPG Maker you'd have to manually transfer your saves and not delete a game version after you've played it.. not without backing up your saves first.
Save files uses very little space compared to a whole game, so for those who delete games to make room for new ones, this would be a good solution if they want to keep playing new versions later on.
This a Unity engine game however and the Dev chose the saves model most RPG Maker games has, for exactly the reasons described above.. or so I strongly suspect.
In conclusion: I once heard this quote from a guy working with IT: "Real Men never take backups, but we often cry!"