Hi Stuart,
The errors you are seeing are likely due to connection problems, where the USB 3.0 port is not working correctly together with your device.
You can find more information on the support page:
http://developer.tobii.com/support/
And you might find useful information in this forum thread:
http://developer.tobii.com/community/forums/topic/moved-could-not-connect-to-eye-tracker/