Do the external view rotation work for you? if it does then you need to rename the Trackir/Freetrack/FacetrackNOIR folder you had installed at some point before and you’ll have cockpit view rotation. Another possibility is to search for their registry entries in Regedit and delete them, but you should refrain from that unless you know what exactly you are doing.
Thanks Snowfox. This is the advice which i was looking for. Rename FacetrackNOIR folder solved the problem.