The email address your account is registered to can be changed directly in the dashboard — in the "Login details" section on the main page.
Steps to follow
Open the main page of the dashboard — the "Login details" section is located at the top.
Main page of the dashboard: the "Edit" button next to the email address in the "Login details" section.
Click "Edit" in the "E-mail address" line.
Enter the new address and click "Save".
Field for the new address and the "Save" button.
An email with a confirmation link will be sent to the new address. Follow the link — after that, the account will be linked to the new email.
Please note. Until you confirm the new address via the link in the email, the account remains linked to the old email.
If you no longer have access to the old email and cannot log into the dashboard, support will handle the email change — the procedure is described in the article How to change your email if you lose access to it.