I may have Found It
OK, log in first....
Scroll all the way to the bottom of the page and in the middle you will see "Your Account."
Under that click "Update your account."
On the right side of the screen just under the little search window, you will see in gray letters "Free Newsletter" and your screen name.
Click your screen name.
On the left under your name you will see the tiny orange word "edit" - click it.
It has a place for an e-mail there and I am guessing if you change it, that may do the trick, but I don't know for sure.
Hope that works for you - KNAPPer