Getting one app to run in Oculus, for exhibition

My Unreal app, is in the library. I can start it from the library. Setting up demo mode, I can select the app from a list. But then if I exit the app, it is not in the demo library (the library is empty). so I cant go back to my app.
(What I really need is simply users not to be able to get to Oculus home during an exhibition)