Public library download for EPUB ebook

I am trying to download the EPUB ebook and a popup directs me to download Adobe Digital Edition 4.5.8 which I already have, Download does not complete and does not appear in my Adobe Digital Editions, I tried uninstalling Adobe Digital Edition, restarted and downloaded both the 4.5.8 version as well as the 3.0 version but I get the same popup to download again. This is extremely frustrating!!