If you run a 64bit OS, you need to check the option during install to add the 32bit binaries if you wish to use TrackIR with A-10C. The main TrackIR program is only 32bit and it doesn't work with the 64bit A-10C exes. So you need to use the 32bit A-10C exes you can install as extras in order to use TrackIR in the game.
NaturalPoint is aware of it, and 64bit versions is something they'll look at when they start up TIR development again soon.
