I use LiveCycle Designer ES Version 8.2.1.3144.1 (CS4). Operating on
Windows 7 64 bit. Have used LC with no issues until today when it will
not open pdf files which are not corrupt and opened perfectly many times
previously as recently as a couple weeks ago. No changes to computer or
program have been made. Have tried opening multiple pdf files (all which
previously opened fine and which I was able to edit in LC with no
issues) and get an error pop up window reporting that program will not
open....