If you are a buyer/reviewer and your organization has changed your email domain, you can change your email address following either this video or the written instructions below:
First log into your organization's portal you registered with and then click Settings in the black banner at the top of the page:
You should automatically land on the Email and Password tab. Enter your new email address in under the Change Your Email heading:
For security reasons, your current password must be entered as well to make the change. Once both the new email and your password have been inputted, click the Change button.
NOTE: Changes to email address must be done individually by the account holder. Organization Administrators do not have access to make these changes through the Manage -> Users section of their portal, and at this time there is not a way to automatically bulk update users' email addresses.