Thanks EDcase. It may be that the software is not supported (maybe only in alpha) or maybe NaturaPoint doesn't support that old version anymore with new games and so on. Oh well, I've waited for an excuse to upgrade my TrackIR anyway ;)
I have TrackIR 3 (without the vector license).
I've updated to the newest version of the software (version 4.2.039) and I still can't get my TrackIR to work. It's recognized in the settings and everything is set up but it just doesn't work in-game.
Is it working for anyone else with TrackIR 3 (without the vector license)?