Selecting an Alternative Scanner App Default in 'Exact Scan'

With my first launch of the OCR function (I’m testing a potential upgrade from Pro to Pro Office for its on-board OCR capabilities), Exact Scan gave me a couple of alternatives for the OCR interface including VueScan (which is a fantastic standalone scan and OCR program), and my scanner’s native app.

My twitchy mouse finger clicked the scanner’s native application but I really want to get the VueScan option back.

How do I do this?

I could find nothing in the Preferences…

If I can use VueScan natively within DTPO, woo-hoo!

Thank you for your help.