From everything that has been written about this exit issue it seems to me that Paradox is attempting to set a Scheduled task during the closing process.  This is failing since it is trying to set a v1 task which will not work in the v2 task scheduler.  Until Corel patches this process we will be stuck with killing paradox.  It would be interesting to see what task paradox is scheduling, unfortunately I am presently stuck with only a Vista box.  It would be possible to import the task into the v2 task scheduler but that would probably not fix the issue with paradox waiting for the task to be set via the api.  If someone can get an xml export of the task paradox is setting I would be gratefull

An interesting an side effect of this is that on an application where the working directory is on a network drive, the project aliases are available to everyone using that directory.  However, the public aliases are not usually shared across the network, unless the users are sharing the same config file for the BDE.  This does not appear to be a very common occurance.

There is also an API available for developers.   I use this for most of  my PDF needs.