Good news!
You are now able to update the email address* associated with your user name on your own!. Just click on your user name, then Account Settings, or click this link.
*Make sure yours is up to date; at some point in the short term future we'll be moving over to utilizing email address (instead of member name) to log into Cruise Critic. To view your email address; click on your user name, you'll see your email address in the lower left corner of your profile page