I have run Digital Editions 1.7.2 for a couple of years, easily accessible from my PAID Acrobat Pro, on several PAID publications.
I am running Windows 8 on a Lenovo Thinkpad Carbon X1 Touch under Windows 8 Pro x64. I have tried using the updated version 2.1. It seems to install fine, but it crashes every time I start it. I had the same problem on my previous Lenovo Yoga 13 under Windows 8 Pro. I see several similar complaints in a Google search.
What's happening with the updates? Does Adobe recognize this problem??