Oh, I somehow missed this post
Full access to the 4e files is gotten by purchasing the Authoring Kit game system package (which as a bonus will also give you access to Savage Worlds). I'm not sure what you get in demo mode, but once you have full access you'll probably want to go into Configure Hero and turn on pretty much all the sources.
If you want to try out our group's unofficial bugfix update to the official system, there's a post
here with our latest version.