It is Adobe Digital Editions version 1.7.2. I logged into Adobe Communities (
https://forums.adobe.com), found my thread concerning the subject, clicked on the links provided by another member and found that they're no longer usable. The version (1.7.2) has been replaced by later versions, unfortunately.
I'm not sure just how user-friendly the latest version is, but it's worth a try. *nods*
I did a Google search just now for ADE 1.7.2. It's available at one particular site, but I'm not sure if it's virus-ridden or not. It's best to not take a chance and stick to legitimate sites... 'Wish I could be more helpful.