Have you tried the app on each device again since then. I received the message on my cell phone yesterday about the update just as I was leaving my house to go to Barnes and Noble. I clicked on Update and continued on my drive. After arriving at Barnes and Noble I tried the app and received the same message, I wondered what was wrong since I was connecting by 3G and never had a problem before so I tapped my return arrow and went back to the screen for the app. I tapped the app again and My Cloud opened. I just checked and it is still working.