Not a suggested answer - just a full explanation - with the help of Dell Technical Support. 'Dell Update - SupportAssist Update Plugin' runs as a background task when running 'Dell Update'; it (should) download to the user PC, run, and then be deleted. Apparently in a non-current version of the 'Dell Update' app, the plugin was not deleted and so was left installed on the user's PC. I'm surprised nobody from a Dell community member was able to assist in this explanation.
Could anyone tell me where I can download the above OUTSIDE the Dell Update process?
Dell Update - SupportAssist Update Plugin