X10hosting allows you to easily switch from their free second-level domain (x10.mx and pcriot.com) to a top-level domain of your own. You should have already purchased a top-level domain from an authorised domain name registrar for this purpose. Once you have switched to the top-level domain, you will no longer be able to use the free x10hosting second-level domain provided by them.
Log in to your x10hosting Account Management Panel.
Choose "Hosting" on the Account Management Panel webpage, and then select "Modify Domain."
Click to un-check the "Use an x10Hosting subdomain as my account's main domain" check-box below "Modify Main Domain."
Type your domain address in the "http://" box (for example: abc123.com).
Click the "Update Main Domain" button.