Hi Scovil,
As you have mentioned above that you have installed Adobe Acrobat Reader DC and do not see the Document Cloud file option there?
So is it the Document Cloud is not available at let hand side file menu or you are just not able to see the files under it?
Because, with the latest update there isn't any changes to the Document Cloud file storage. It should be available in the file menu list.

Can you please Sign In in the application and see if that's giving an option to see the Document Cloud storage? Also, share the screenshot of the "Home" screen of your desktop application.
For testing purpose, you may check the same online once- Adobe Document Cloud
Regards,
Akanchha