The LaunchCalibration() function is not available in the new Unity SDK.
But it’s possible to just run calibration process with a special flag.
c:\Program Files (x86)\Tobii\Tobii EyeX Config\Tobii.EyeX.Configuration.exe –quick-calibration
It will be a 3-point calibration with no button presses needed.
Hopefully this suits your needs, please let us know.