Hi @alexs,
Sorry to say but there was never any development of the EyeX Software to support Tobii Pro range of eye trackers.. and quite intentionally.
The official policy is that Tobii EyeX Software should only be ran with the EyeX or Steelseries Eye Trackers.
That being said, it might be worth your while to upgrade the firmware on the x2-60 tracker and see if that might
resolve the issue.