I received notification in the Wiim App (version 3.0.9.24122718) today that my Pro Plus had been updated to firmware 4.8.639035 and now almost everything I play results in clipping to my receiver. I did not have this problem before the update. I have tried restarting the Pro Plus, including unplugging it, dropping the max line out level to 500 mV, dropping the pre-gain for ethernet to -10db...nothing has solved the problem. Is there a way to roll back the firmware update so that I can go back to playing music?