1. Log into the product portal with your username and password.
2. Once logged in, go to the lower left corner of the screen and click on the little "i" for information and then click on "Profile".
3. Go to profile and select "My Information". From here you can change all the displayed boxes of you profile.
4. You will see your account information pop up, press the lock button to enable changes on your email. When it is unlocked, change your email and hit "Save". (your password will remain the same).