I updated PM5 to 15077 back in January.  On March 31st, I updated to 15419 and ran it ok.  Today, upon starting PM, I was notified that I need to register it.  Entering my registration info, I was informed that the license is invalid.  Checking the web site, it states that my update license has expired.  Mt account says I was eligible for upgrades until 2013-08-13.  I haven't been considering the minor updates that have been announced to be 'Upgrades" and the fact that I installed 15077 in 2014-01 would seem to be consistent with that understanding. I would not have installed 15419 if I had known it would effectively invalidated my license.  
I uninstalled PM 15419 and reinstalled 15077, but the license is still declared invalid. 
What are my options for getting PM up and running again?  I would happily stay with 15077 for now.