My Komplete Audio 6 stopped working after the upgrade to El Capitan. The computer is a Mid 2014 Retina Macbook Pro and it used to work just fine under Yosemite. But under El Capitan it's not recognized and the USB LED keeps blinking. On my main studio computer, which still runs Mavericks, the Komplete Audio 6 works just fine and the USB LED stays lit too. What's going on here?