If you have an active Site Builder service, you will see a box (below) when you log in to the Client Area.
If you have more than one active service, a menu of domains will also display.
Click Manage to log into Site Builder. This will perform single sign-on into the Site Builder editor in a new window.

You can also access Site Builder for a specific website by navigating to the hosting package details and clicking the Site Builder Manage button (below).
