Susan, when you change your email address, simply click on the "profile" link above. After entering your username and password, you'll be able to change all information in your profile.
If you change your email address, the software will generate a new password for you and send it to the new address, in order to confirm it's a valid address. Use that password to log back into your profile, and change it to whatever you want.
Kevin Jon Schlossberg
SysOp and Administrator for BladeForums.com