Yodeck and Previews... is this a little odd?

I have to ask is this normal:

I am testing Yodeck (free test) and one of the things I would normal do in a development cycle is preview on my screen to make sure that the output looks correct and that the playlists etc are working properly. yet, when I try to preview, I am told that the preview isn't registered as a screen, so I cannot preview.

Does this mean I have to pay $150 a year for previews if I decide to run this product?