Hi! I use ADE (ver 4.0.3.117585) on my macbook (ver 10.10.4) to load borrowed books from the overdrive to my Kobo Aura (ver 3.12.0). Recently, I hate using it because it keeps telling me that the document can't be opened because it's not authorized when I've already authorized my device! I have deauthorized my Kobo device then download the eBook to my ereader again but it still tells me it's not authorized. This method of deauthorizing and then re-loading the ebook into the ereader worked for the first book but for the following books the same problem happens again. Reading the official ADE forum, it seems like many people are having similar problems, many are left unanswered and some I don't know which solutions are suitable for solving the problem I'm facing. I would really appreciate some help here!