I've just upgraded to iTunes 12.0.1 in Yosemite and can't seem to download my purchased movies and TV shows. They show in the iTunes window, with a cloud icon next to them, but they are grayed out. I can click on a title to highlight it, and I get a contextual menu, but there is no option to download the item. Double-clicking does nothing. I can't find any setting that might control this. Help!