Decided to start over with my sync setup on my iPhone 5S running iOS 8. I deleted the Sync app, then went to the App Store app, found the Bittorrent Sync app, then clicked the download icon (cloud with down facing arrow). The download icon briefly changed to the spinning circle, maybe a half second, then changed to an update button. I clicked the update button, which changed briefly to the spinning circle, then back to the update button. Repeated clicks of the update button give the same result. I tried powering off and rebooting the phone, but the problem persists. Any suggestions?