To change your email address you must login with email/password authentication:

1. click the log in button at the top left
2. type in your email address and password*
3. then click on your name at top left once you are logged in
4. Click on the word email in your profile page (next to your email address)
5. type in your new email address in the email address field
6. click change!

*If you have not set a password or can't remember your password:

1. Press login in the top left of the page
2. in the dialog that pops up press "need password?"
3. follow the instructions to reset your password and make sure to check your junk folder, especially if you use gmail, for our password reset email.