How to reset shortcuts (.lnk file) in win7?

Somehow I went to open a shortcut and windows couldn't find the target but instead of pointing the shortcut to the exe it pointed the lnk file handler to the exe, so now all my lnk files are trying to be opened by the borderlands game.

WTF?

I'm guessing I can do it by resetting the .lnk entry in HKEY_CLASSES_ROOT, but I don't know what to set it to.