If you don't mind going back to the default GV key mapping, Just delete the file Vehicle.kmp in your setting folder.
So that's Mode 2?
No it's not. The modes are not being saved seperately, but part of your single joystick settings file. The keyboard has no different modes at all, and the .kmp files are the keys (not buttons) settings for the different types of commands.
Hmmm...Is this the reason why my modes are not switching automatically even though it's checked on?