The FOV Changer only works in the Multiplayer. I programmed it myself and as you can see it works perfectly. You can go from 65 to 180 FOV. I played at 110.
I marked the way to the FoV changer.exe with red points.
Download it here: https://mega.nz/#F!lvQEgDID!eUITPk_4A... (fixed it)