Acrobat Pro DC crashing when saving Document, Page and All Javascipts

All of a sudden I have lost the ability to save and execute any Javascript in DC Pro. Whenever I click OK to save any Javascript code in either document, Page or all Javascript  - DC immediately crashes with following message.

Problem Event Name:                          APPCRASH

  Application Name:                             Acrobat.exe

  Application Version:                           15.10.20056.36345

  Application Timestamp:                     567415e0

  Fault Module Name:                          EScript.api

  Fault Module Version:                        15.10.20060.43353

  Fault Module Timestamp:                  56d0a4f9

  Exception Code:                                  c0000005

  Exception Offset:                                0000e074

  OS Version:                                          6.1.7601.2.1.0.256.1

  Locale ID:                                             3081

  Additional Information 1:                  0a9e

  Additional Information 2:                  0a9e372d3b4ad19135b953a78882e789

  Additional Information 3:                  0a9e

  Additional Information 4:                  0a9e372d3b4ad19135b953a78882e789

Running windows 7, have updated DC with latest updates and have done a restart. All to no avail. Can anybody help?