Well, the file that I downloaded is definitely a diffrent one because it had like 400 and something MB, while my save file has around 150.
Its dark outside here, so I'll try the renaming tomorrow.
If it doesn't work either, then I'll write it in this topic
(And about giving me a new game, I put my old file on the desktop, while I put the new one in the folder)
I think the renaming is the problem, because I accidentally downloaded the new file 2 times and they were like
Game (1)
Game (2)
So yeah, if that is it, then it is all my fault.
(Also hyped for Delicia's Delicious Dreamland! I downloaded it before I closed my Pc and I'll try it out tomorrow )