In the top nav bar, click on the "Profile" dropdown. It will expand.
Click on the ( Menu) icon on the top right corner of the page. The menu will expand.
Then click on the dropdown that says "My Profile". It will expand.
Then click on Edit Settings in the list of links.
Then click on Edit Email Address in the list of links.
Fill in your email, and click the "Save Changes" button.
Note: It is a great idea to keep your Email Address current, so that you can receive our notices (when you get an "Email" or "Like" on the site), and so that you can retrieve your password, if you forget it.