Do you want to change the domain name set as the main one for your hosting account? No worries, it can be done in a few clicks!
Make sure that the domain name, which you want to be the main one, is visible in the list at Hosting → Manage → Add Website:
If it’s not there, add the new domain using the Add Website button.
Go to Hosting → Manage → Set Main Domain:
Open the drop-down list and choose the domain you want:
Congratulations, you have successfully set a new main domain! 🎉
If you don’t need the old domain name anymore, you can delete it at the Add Website page.
NOTE: Set Main Domain feature simply renames your hosting account name. Note, that it has no influence on website files.