John,

When I unplug the USB, both items disappear and then reappear when I plug the dongle back in and the machine is on. I think I've got it recognized.. and using the odd app that Kev mentioned a few posts up, was able to get the laser (or red light) to move on the engraver... nothing engraved, but the computer told the laser to move, and it moved.

Still can't get EZCAD itself to do anything, and still get no dongle, so that'll need to be solved. If I can find who manufactured this thing in 2017, with a board from 2010... maybe I can get a dongle with 2.5.3