To change your default email address, you will need to add a an additional address on your profile page. You can do this by logging into your account and completing the following steps:
Navigate to your profile page
Scroll to the designated email on the left-side panel and click the pencil icon immediately to the right of the address
Enter a new address and click the "ADD" button.
The system will then prompt you to validate the email in your inbox. Once a new address is confirmed, you will be able to set your default address by navigating to the same window on the profile page.
If your email changed AND you are locked out of your account, please email email@example.com for additional guidance.