How to change your hosting account's main domain
From Acenet Knowledgebase
You may change the domain name on your shared hosting account at anytime. There is no fee for changing your domain name, however, you will still have to register the new domain name at normal pricing if you haven't already registered it.
To change the domain name on your hosting account, simply submit a request to our Technical Support department at our Helpdesk.
You will want to specify the domain you're wanting to change from and the domain you want to change to in your request.
If you would also like to register your new domain through us, you can do so here:
