I think I found a bug, but I don't know if it it related to the new version or if it has been around for a while.
I hit the connect button and selected "wireless/sync books" and the program went back to the book list. I figured I had missed the menu popup and went back and did it again. It started the connection, but then after a while, I got a failure popup (or rather pop-under) from the first connection.
It appears that the first connection had started, but it was taking its time about failing, but CC didn't mind me starting a second connection while the first one was running.
I am enclosing a screen shot so you can see what I mean.
Edit: After the metadata finished syncing, I closed the dialog box and at this point, I was still connected and could send files, but CC would let me change all settings and try to connect again.