Howdy, @shaunmoloney!
Thanks for writing in! Our “Standard” and “Expanded” demo content is only available to users of X as that content is built specifically for those users utilizing our Content Builder along with our Theme Options based header and footer options. When upgrading to Pro, these demos are not available for use but you will now have access to our “Design Cloud,” which is only available to Pro customers. You can learn more about the Design Cloud and the resources available here:
Remember that X is built to be a simpler option for users to get things setup and running while Pro is built for users who desire to have more customizability over every facet of their design. Because of this, Pro’s Design Cloud features numerous starting points from headers and footers to presets and content that will allow you to mix and match and customize more readily as you like.
Hopefully this helps to clarify things a bit, cheers!