I received the goggles today and before anything else I updated the firmware via the latest version of assistant 2 which is v1.1.1 2017-04-27 (the link is below), all the settings after that including activation was done easily via assistant 2.
Assistant 2 link:
DJI - The World Leader in Camera Drones/Quadcopters for Aerial Photography
Assistant 2 link:
DJI - The World Leader in Camera Drones/Quadcopters for Aerial Photography