Toad Data Modeler 3.4.14.6 takes a long time to shut down (57032)

The  version of Toad Data Modeler, 3.4.14.6, takes a long time to shutdown (approximately 30 - 45 seconds).

This occurs when trying to shutdown from either of the methods below:  
1. File | Exit
2. Clicking on the X button in the upper right hand corner

With Task Manager open, the Application tab shows Toad Data Modelers status as 'Not Responding' and the  CPU Usage: around 50%.
It stays for about 30-45 seconds and then eventually disappears or shuts down.

WORKAROUND:
None.

STATUS:
Waiting for fix in a future release of Toad Data Modeler.