From Support

If you'd like to change the email address on your account, you'll need to open a support ticket by sending an email to support@realdesignonline.com.

Please format your email like the following:

I would like to change the email address on my account.
 
From: old@example.com
To: new@example.com
Reason: _______________________

We will notify you at both the new and old email addresses when the change is complete. You will then be able to log in with your new email address, and the password will be the same.