Default password? Factory reset? I just plugged them in and they worked with the game. There is a reset button on the back of one of the earphones that I pressed to align the glasses to the position I was sitting, but that was after the game had already started. There's a menu in the goggles that you can access by pressing the silver button on the control box, but I didn't make any changes there. I don't remember any prompting for a password.
As far as I can tell, the thread is pretty self-explanatory, even if you've NEVER seen one of these before...