The other day, I restarted the app and got the calibration to work. That was then. Now whenever I start up, there is no calibration and controls don't respond nor can I calibrate them - although the app sees them (they're in the control menu). I plugged both yoke and pedals directly into the iMac rather than through a hub, but still no joy. What could cause it to recognize that the devices are attached but not recognize the control inputs when trying to calibrate them?