I have  a similar problem. I try to do renders like the promo pics for the product and can't find a way to hide the walls. There don't seem to be separate material zones for each wall, and no poses to hide them.

If I move my main camera around to render from the reverse side (which they have in the promo pics), all Im get is a blurred images, as if the cityscape background is getting in the way. I'm not zoomed out that far, and have changed the focal from 55 to 35 with the same results.

As mentioned above, no camera presets come with the package.

I've IMed one of the vendors who made it, but haven't received a response as yet, and the readme file isn't very informative.