HEY THIS JUST WORKED! I have no idea why, but extracting all the files no one folder in my desktop solved all the problems and the game seems to be running normally. Thank you very much!!
To help me with future problems, can you show me how the folder structure looked when it didn't work? It should look like this (the OpenGL version will have additional DLL files but it should generally be the same):
When it didn't work I had just extracted the "content" folder togheter with the application. It worked when I extracted ALL the files to the same folder (in the desktop). It was probably just a dumb mistake that I did, but thank you very much for the help.