Elemental registration invalid?

So, it's been a while since I futzed around in the beta- I preordered, so I have had beta access,  but I logged into impulse today, and tried to update elemental, and it claimed my registration was invalid.   I don't see any other support options for elemental, so I'm posting.

I double checked the emails I have with my serial #, and attempted re-registering, but it claimed the serial # was not active.

So, how should I contact support so I can provide my email address and registration info, so they can look at fixing this?