Try to unplug usb cable, then power cable from Mitras, plug power cable back in and wait until Mitras ist started and then plug in the usb cable. If the problem is not fixed, I would like to ask you to provide me screenshots from your driver details.
I installed the driver on my mac yesterday to test it and it works normally, but I'm using boot camp. It is possible that parallels software doesn't forward the signal from Mitras.