The change has been made. The system automatically generates a new password and sends it to the new email address. If you want to change the password after you get it you can go back into the profile and do that.
The way to change the email address is through the profile link. after you log in with your Username and Password a screen will come up where you can change the email address, password, occupation, hobbies etc. If the email address is changed the system sends a new password automatically.