FaceTrackNoIR v201 uses two engines: "Face Tracker v1.7" (OpenCV) and "Face Tracker v1.6" (Legacy).
If your game (like IL-2 Battle of Stalingrad) isn't picking up the tracking, go to your install folder and try renaming NPClient64.dll to NPClient.dll . This is a known fix for certain 64-bit titles. facetracknoir v201 install