Hi all,
Word of warning: recently my CS4 installs of InDesign and InCopy stopped working - crash on startup. The crash report indicated something wrong in a required plug-in AWS/AWSUI. After some digging, I found that this plug-in seems to do things related to Version Cue and Adobe Drive - and the light bulb went on: I had installed Adobe Drive 3 a few days before.
Uninstalling Adobe Drive 3 revived my CS4 apps.
Posting my findings here to help other hapless souls that fall into the same trap...
Cheers,
Kris