Thank you for the help, but it seems like the way to go around this problem was even simpler.
Whenever i unzip files using WinRAR i always right click on the file and use the "Extract Here" button. Whenever i tried that with Nimbatus i got that error i was talking about.
But then i accidentally misclicked and instead pressed "Extract to Nimbatus_Windows64" which made me a separate folder for Nimbatus and it unzipped perfectly and i was able to run the game.
Still, thanks for the help and if that happens again with any other zipped file, ill know what to do at least.