I have been using my Libre for over a year now with epubs from my public library with no problem. Yesterday I went to move some newly borrowed books over and was asked to authorize my device. So I did - not much choice really. Message says device authorized, I proceeded to move files. When I try to open them on Libre I get File failed to open message on all books from library. My books loaded through calibre work fine. Library books will open through ADE on PC (Windows) from LIbre. I have upgraded firmware on Libre, removed and reinstalled ADE on PC, removed and reauthorized Libre. Problem remains. I downloaded free ebook from Adobe - same issue. Non Adobe DRM files work fine. Can anyone shed some light on this for me?