With the new ADE version fails to download drm Books

On windows 10, and ADE new version 4.5.4, it will not download a DRM book from the Ontario Library Download Center as done previously many times before; have performed the deauthorization/'removal/ resinstall/ redownload/ reauthorize process without impact. the book file is in the appropriate folder when we search for it using Windows Explorer.Has anyone had any success with Registry corrections?:

thanks.