Found this plugin through the Dashboard search for a new Plugin. Your name is listed as the creator. (You wrote that it wasn't one of yours...)
Please try searching for the exact title above.
What I am looking for is the ability to allow the form submitter to choose an email from a list of potential destinations, as is offered by some other form plugins.
I had hoped that this add-on would do the trick.
Do you have a solution for this?