In order for you to change the email address, your account needs to be verified and your 2 Factor Authenticator needs to be enabled. Here is the step by step on how to do it:
1. Go to your Account page.
2. Click on "Settings" and "Change E-mail" to enter the new email address.
3. Insert the new email address, the one time 2 Factor Authenticator code, and click "Change E-mail"
4. You will receive a confirmation email to ensure you're the one who requested the change. Just click on "Click here to confirm this email address" to confirm.
5. All done. The next time you signup you'll use the new email address.