That’s a bit more complex than it may look at first sight since multiple .inis may be affected for a game for example. If you have games that store their settings in the Steam folder (true for example for Portal/Half-Life-2), then please check whether your Steam install folder location is correct in the Windows registry. That’s what vorpX uses as a starting point for config files below the Steam folder. The key for that is: HKEY_CURRENT_USER\Software\Valve\Steam\SteamPath
Just in case: If you happen to have a separate admin user account on your PC, make sure to never run the config app as admin, otherwise the Game Optimizer may not be able to find user related paths on multiple occasions, including the Steam path.