I’ve got an Evoluent VerticalMouse 3 (rev 2) for work.
It’s like a normal mouse, rotated a quarter of a turn. It’s good because it means I can hold my hand in a more comfortable position. It’s bad because the buttons won’t do what their told!
My problem was that I kept clicking the extra button at the bottom of the mouse – that silver bit that’s lower than the normal mouse buttons is a button in its own right. I had the Evoluent mouse driver installed, but it didn’t seem to have any effect. My googling turned up nothing because the issue was addressed by their website as “Some buttons do not work” instead of “Some buttons do the wrong thing”. I did eventually make the connection:
“The VerticalMouse must not be moved to another port after installing the driver, otherwise the driver will not load and some buttons will appear not to work. If the VerticalMouse must be moved to another port, uninstall the driver and install it again after moving the mouse.”
Voila! Uninstall and reinstall the driver and all’s well.