OK I've fixed it. This sounds really stupid but make sure your system Timezone is set correctly. Mine was set to nearest city (Cardiff, which technically I am closer to), and when I changed it to London, all Adobe apps started working!!
Give it a try
I've got the very same problem, only started happening last week. I thought it was something to do with the fact that I recently (finally!) upgraded 10.3 to 10.3.9
Havent been able to find any clues as to how to resolve this.
HELP!!