First you will need to be logged in
Then go to your Profile page:
Once you are logged in, on the very top of each page on the gold bar you should see your name. If you don't see your name then you are not logged in, please do so.
Click on your name that will take you to your profile name
You could also click on this link to go to your profile
On your profile page, to the right of your photo and name you will see a gear symbol
Click on the gear and you will see a drop down menu appear.
Click on the "Edit Profile" of the menu.
That should take you to your profile page to change your email address or some other information like your phone number and address, etc.
Once done with the changes then click the "Update Profile" button at the bottom of the page.