Since updating to Mavericks the App Store shows I have 7 updates, including the three iWorks program, iMovie, Busy Cal 2 ,Voila, and Home Inventory. I have done all of these updates more than once now. The apps show the current version. The updates show as done in the "Updates Installed in the Last 30 Days" section. I cannot open any of my iWork programs because I get an error message saying they are being updated. I have tried restarting to no avail.