I hope this isn't too stupid of a question, but how does the new build know all the saves and data from the previous build (im very stupid, so someone please enlighten me). Because I just downloaded the new file and it has all my saves and stuff already.
You're not stupid for asking, it's fine. Ren'py saves aren't held in the same folders, they're put into a seperate folder outside of your game files that Ren'py can access. Meaning even if you completely deleted both of your files of Roads Yet Travelled, and redownload it at a later date, as long as you are using the same computer, you'll still have the same saves. If you want to see your files on windows, you can press the windows button+r, and then open %appdata%, and look into your RenPy folder. If you want to see it on a different device, I can't help you there, but I'm sure it's documented enough on the internet that you can find it easily through whatever search engine you prefer.