Help - I have just updated to IOS 7.0.4 and decided to read one of my books from my kindle app. First it asked me to re-register which I did but then I cannot open any book and when I try an error message pops up saying 'remove the book from your device and redownload from cloud items'. What on earth does all this mean? I haven't a clue. Has anyone had the same issue and solved it? Please let me know! Gary