Okay I just recently found the solution !
The problem is that despite erasing the PRO files, the parameters are still registered in the registry entries.
To erase those parameters in the registry entries you must access the registry by typing "regedit" into the Windows search bar and pressing Enter (Be cautious when working with the registry, as deleting the wrong entries can cause issues with your system).
Then look for HKEY_CURRENT_USER\Software\ and search the file corresponding to your game (it should be named PROteam or something like this).
This file stores the parameters of your game thus you must erase it.
Then it should fix the problem