I cannot seem to delete PowerPoint from my iPhone. The latest update froze it and now when I hold and hit the X, I get a message saying Do you want to delete ""? When I hit yes, nothing happens. I've tried signing in/out of App Store and rebooting iPhone at least 3 times and just cannot get rid of it. I have also tried to reinstall PowerPoint from App Store (I get cloud icon) and it begins installing over problematic one, but it stops just over half way and freezes again for another 12 hours or so. Any advice?