Have downloaded new version and book is inactive

I've downloaded the newest version and now, when I download a book, it appears on the screen with gray print - not black - and there is a cloud icon over the cover image. The book is inactive and the program won't close unless I use task manager. I have de- and then re-authorized my account and can't make heads or tails of this. The ebook I downloaded doesn't appear when I reopen the program. Help!