Okay, so this is a liiittle embarrassing, but I don't know how to recalibrate the ESC to the radio.

I tried looking it up, couldn't find it, emailed megatech, they're all "send it in! with all your money!". sooo, yeah. couldn't find any obvious buttons. Any ideas on how to do that?
(PS: the trims were waaay out. I had one dogbone fall out, so it was 3-wheel drive for a while :P )
(PPS: There's nothing mechanically wrong, and a new reciever and esc don't help.)