I have already contacted Kobo who told me to uninstall the ADE 4.0 and install the ADE 3.0. I've done this, and nothing. I've erased the authorization for the kobo that was still there, and authorized it again. Everything is authorized. I've even tried borrowing a second book and downloading. These books are showing in my ADE as being in the kobo. On my kobo ereader device, the icons for the book are black.
Did KOBO and ADE is authorized with the same Adobe ID?
The Kobo and the ADE are authorized to the same Adobe ID. I have double checked everything.