You can change your email address by clicking your username in the top right corner, and select contact information. Change your email address to the new one, and then give it a few hours to sync up and then you will eventually be able to log in at https://www.heliohost.org/login/ with the new email address. To change your forum username just let us know the new username you want, and an admin can change it for you. The only way to change your hosting username is to delete your account and recreate it. Most people just stick with the username they have already.