Same problem. I have sent, what I understand to be a properly formatted email to the register email. Since 2 or 3 May. I have sent it from both of my primary email addresses (paid through paypal which has a different email than what I usually use.) I have received around five failure emails. I have responded to the address listed in those emails and haven't heard anything. I noticed this forum is fairly active so I figured I'd try all avenues.
Also for the RC owners, a couple of the emails were a bit "grumpy" that was before I knew about this format issue thing. So apologies for those. That said some help would be appreciated, I am looking forward to being able to use your product.
Update: Well I may be a big idiot, we'll see. I just noticed it was supposed to be last name then first name. I have resent with those swapped.
Update 2: Nope, still failure. Will wait for a response.