It looks like you have your website on our basic hosting. Please follow these instructions to set a new domain to your basic hosting: https://www.dynadot.com/community/help/question/change-domain-basic
Unfortunately, we no longer support our Advanced Hosting. We do offer VPS hosting, but that is for very advanced users: http://www.dynadot.com/web_hosting/about.html. We also have a new website builder that might be a great option for you: http://www.dynadot.com/sitebuilder/about.html. We have a free version you can check out to see if you like it.