Yes. I can confirm that the 3.0 Auvidea firmware enables the second USB 3.0 port.
The fan issue is still a mystery to me. As reported in another thread here:
the same problem apparently persists also with the J120 board.
@kayccc I tried to contact Auvidea support several times by mail and by phone, they always promised to get back to me but they never did over the past 10 weeks now.