Tim S.
Hi hadron, Thank you for posting your question. I'm more than happy to help you. You will need to send a request in writing to have a primary domain change. If the domain is currently an add-on domain, you will need to remove it prior to the change. Here's an article outlining how to request a primary domain change. Please make sure when you submit the email to provide us with your primary domain, the domain you want to change the primary to, and verification. Verification can be either the last four digits of the credit card on file or the current AMP password. I hope this helps! If you need further assistance please feel free to contact us. Thanks! Tim S