My ipad air on ios 7 is unable to download and install lightroom mobile. It will display the download circle but will not proceed. Then it will display the icloud download icon, not having installed on my ipad. I try re-downloading but the process repeats itself. I have tried restarting my device and relogging. The problem is not wifi or network related. Other apps will download fine and my connection is stable. I cannot uninstall and reinstall the app because it was never installed in the first place. The app icon never appears on my home screen to show that it is waiting on the download. It says that the app has already been purchased and shows under my purchased but not on this ipad tab in the app store.