Did I break Creo 2.0 PhotoRender?

I was making some rooms and I could have sworn that the Photolux scenes at least displayed their image in a room rendering.

Now when I open one fo the Photolux rooms, I get a bunch of gray walls.

What happened? Or am I just imagining that I once saw these?

Also, what is the little "+" button do in the option/system library dialog window?