keynotes will not update
My keynotes App will not update on my Imac. My imac is running 10.8.2. I have tried shutting my computer down and restarting, and I have tried to start up keynotes and then closeing out of it but I keep getting the same "error" when I try to update the App. Can someone please help.
Thank you
iMac, OS X Mountain Lion (10.8.2)