Hi,
The CentraStage agent will only uninstall itself if if specifically given instruction to do so either via the Webconsole or by running the Uninstall.exe from the c:\Program Files\CentraStage\ folder. In both cases the uninstall routine removes all traces of the application including the aforementioned folder. I guess there could be a chance that the uninstall routine did not complete properly leaving some traces of the application behind but it's unlikely in my experience.
Is there anything in the event log for the time you received the error? The CentraStage agent is based around two elements CagService.exe - which is the bulk of the agent and gui.exe - which is the task bar icon and agent browser. If the cagservice.exe service is being removed or stopped it would be flagged in Windows Logs\System and/or Windows Logs\ Application in the event viewer. Worth checking in there to see if there are any clues.
I hope this helps
