iTunes Store Not Updating? How to Reset the iTunes & App Store Cache
The iTunes Store updates frequently to display new apps, music, movies, TV shows, and the free app of the week, and typically you can see the new stuff by just clicking around in iTunes to visit the various stores and media content areas. But sometimes the iTunes Store may display stale content, particularly if the iTunes app has been left running for a long time to listen to music or Radio. If you find the Store is not updating itself, the first thing you should do is try refreshing the iTunes Store by hitting Command+R (control+r if you’re on Windows) to force reload. That may resolve the not updating issue for some situations, but in more stubborn cases you may need to perform a full fledged cache dump.