ADE not showing any "bookshelf"

I borrow ebooks from my local library. However, i can't seem to download anything on ADE 4.5.7 it doesn;t even show a "bookshelf" on the home page. Can anybody help me? I have uninstalled/installed a million times. And authorized/eraseauthorization a million times as well. It's quite frustrating. My ereader is just a paper weight lately!