You can not update your e-mail address for an existing profile without our help. The email address is your login when you log in to the account. To change the e-mail, you need to write a request to the Support Team.
After changing the e-mail address by the support operator, you will receive an activation letter with your new email (check Inbox and Spam folders). You should open an activation letter and complete the registration on the link in this letter. Then you can log in to the site.