You can find your account information using the greyed out link My account at the top right hand side of any page of the website.
You can change your contact details via these two boxes. (You can ignore all the other ones you find on the My account page). When you change your email address, please be sure to update it as your primary email address or the change won't take place. If you don't want your contact details to be included in the Member Directory, you can manage that in the Profile section