The "Lobby" is where you find yourself after clicking on the Title screen.
Clicking on a Door in the Lobby will take you into an "editing room"
which is connected to a particular project. You can have up to 40 projects
on a system at once and they can be a mixture of TV standards and
resolutions. You can connect multiple doors to the same project if you wish.

Clicking on the "Door generator" in the bottom right hand corner of the lobby
will create a new door. This can then be used to create a new "Project" within the system.