Nono, I have asked this elsewhere and don't remember answers.
I rarely downloaded games that you had to unzip and stuff, more on plattforms like steam.
I'm just not sure how this is supposed to work. Can't really explain it, but I can't simply download and replace the old version with the new one and keep the old saves or can I?
I would say the easiest way to explain it is, I have not much experience with how to do it so i can continue the game but update it to a newer version. I also keep overthinking these things, because while writing this I get the weird feeling it might be easier than I think.