If you want your domain changed, the easiest way to do it is to backup your current site that you wish to have your domain changed, send a request to Jay to have service canceled on the old domain (this will take upwards to 24 hours in some cases), sign up for a new site with your new domain and lastly restore all of your site files from a backup (either an entire folder or a ZIP file via FTP or the file manager in DirectAdmin as those are only supported and will only work on the server) to your new domain. You'll have to do this each and every time you wish to have your domain name changed on your hosting account as you can only host 1 SITE ONLY at a time on the free hosting plan.