We are asked very frequently about changing the domain name on accounts. This is possible. We do suggest you do some research to make sure this is a step you truly wish to take.
If you have decided to move forward with a new name, then contact us at the support desk and -
1) either purchase the name at merchantmoms or point your name servers to your current merchantmoms servers
2) let us know to make the change on our end
3) update your Mal's area to reflect the new name
4) update your site to reflect the new name