If you have the Steam version of the game, they do have a "Verify game files" function somewher in their menu system that will indeed fix up the game folder just fine. It overwrites the existing files, whereas a re-install, if you have not already deleted the old files, will just add any missing files back in, and does NOT overwrite things... Just remember to also empty (delete) the Save folder again also though, such as:
I used the "short-cut", but got the actual path to show there... propb is my UserName on this computer...