Okay I shut down the modem, the hub, and the wifi, and finally got them talking again. I feel much better now.

I was updating about 12 apps when I returned from vacation and the other apps updated, but not this one. I have retried several times. I have not yet turned on the computer that is synced to the iPad, so I have not yet tried Amber's solution.

I finally just removed the app and reinstalled it...bingo!