AfterApplying AdobeDC patch, all machines lost Adobe file associations

After applying the below patch, all machines that this was applied to, lost their local file associations with PDFs and are unable to open PDF docs via IE or Chrome.

LANDESK Patch News Bulletin: Adobe has Released Acrobat Reader DC version 2015.008.20082 for Windows 15-JUL-2015

Running a repair Installation via Adobe DC (Reader) fixes the issue, but why is this causing this problem, and how do we fix this on a wide-scale?  has anyone else encountered this problem?

Thanks!

LDMS 9.6 SP2