I am not an expert but this topic has been around the forums
for a while but in the General Discussion area. Try this link.
http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=67&catid=464&threadid=1269800&h...
You can also do a search in General discussion and there are
several topics for this issue that may give another answer. It is
always a good idea to search for the topic before posting one.
From my perspective if you want a captivate project to close
when it is done just go to the Edit menu, Preferences, Project,
Start and End and select the way you want the project to
end.