Why is "Authorize Computer" not clickable? I have new ebooks (epub format) and I can't read them. Apparently my copy of Digital Editions was originally authorized under another email account. I suppose I need to link accounts. How can I do that without deleting my current installation? If I do that then I probably lose access to my existing library, right? Also, while I have downloaded by ebooks to my computer, I want to be able to read them on my tablet. Do I have to go through this whole ordeal again for that device?