MX Ergo user here, too, for the past couple years. Prior to that, I'd used the less expensive Logitech thumb trackball mice for about 20 years. I agree that one of the best benefits of them is it ...
Uh, does it not work? There should be HID-compliant drivers built into XP64 that work with it. Or do you mean the software Logitech makes for assigning buttons and stuff? It seems like they never ...