Yesterday: TrackIR support! Today: nothing...

[J van E]

When I started the game yesterday for the first time I was happy to discover I could look around with TrackIR! Awesome!

Today I started the game and suddenly TrackIR does nothing... TrackIR itself does work (as I can see in the TrackIR window) but just not in the game... What has happened...? I didn't change any setting...!

EDIT
Created a new profile and immediately TrackIR works again... Odd...