If you want to move your Web Presence Builder site to another domain, you can do this using the backup and restore functionality.
First, backup your current Web Presence Builder site and then download the backup to your computer using the save icon.
Now on your new site ensure that you have installed Web Presence Builder (please read this guide if required).
Open up your new site in the editor tool (you can select any site template during the initial setup process, this will all be overwritten when you import your existing site). Finally upload your saved backup using the restore functionality (please read this guide for more information). The upload icon has a green arrow and will allow you to select the file.
Once you have confirmed that you wish to restore your site from the backup your existing website will be uploaded. All pages and files should successfully upload, and you will only need to click Publish to make your site live.