Mystery Adobe ID

I recently accessed a University ebook site called Proquest.  I had to create an account and then in order to read the ebook, I had to download Adobe Digital Editions (version 4.5) onto my laptop.  In that process, I was never asked to create an Adobe account.  I can access the book no problem, however, reading from my laptop isn't comfortable.  As such, I decided to access the document via Proquest from my iPad.  In order to do that, I had to download an App by the name of BlueFire Reader.  In that process, it asked me to set up an Adobe Account which I did.  However, when I attempted to download the book from the site to the App on my iPad the following message appeared:

This application is authorized with the following user accounts:

resolvecrc@gmail.com (AdobeID).

This item was originally downloaded with a different user account or Adobe ID. To continue, please add that account.

I have attempted to find out through Adobe what the other user account/ID is for the desktop version and they have not been able to help me.  Nowhere in the desktop version is there any way to access what the user account/ID is. I have tried all other email addresses I have to which the response is that Adobe doesn't recognize them.  I have reached out to Proquest and they have not yet responded.

Any advice folks????