The email address entered in your account is the one you registered during your registration. You can check it and modify it anytime in the tab "Account", in the top left of your screen.
1. Enter you new email address
2. Click on "SAVE"
3. Enter you actual password to validate the update and confirm that you are the requestor
4. Click on "SAVE"
5. Confirm your email address by clicking on the link present in the email you just received on your new email address
Note: If you do not confirm your new email addess, the update will not be considered. The old email addresse will remain the one to use for the connection and notification emails reception.
If you get an error message when updating your email address, please read this article.