Now this pop up will slap you right in the face, you can't miss it, choose the delete animation files, a confirmation box will come up for you to confirm the delete.
When this is done, hover over the pic again and in the pop up choose download this time, the show will download.
Me, I download the trailer first, then go back to your collection and you will find the picture is gray now if the trailer was downloaded first, hover over it and click the plus again to download the full show.