I've added that domain to your account for you. Please note that it may take up to 2 hours for the domain change to take effect.
If after a full 2 hours it doesn't work on your side, please make sure you clear your web browser cache: https://wiki.helionet.org/Clear_Your_Cache
Account segonist has been reset. When it finishes, you'll receive an email with a link to create a new account.
If you need the data from the old account, it will be available at https://heliohost.org/backup/ once the reset is complete.