Conductive Labs MRCC 880

Download the firmware ZIP from conductivelabs.com/download/mrcc-firmware-update/, extract the .hex file. Install Teensy Loader from pjrc.com/teensy/. Connect the MRCC's USB-B (PC) port to your computer. Open the .hex file in Teensy Loader, click the green Auto button, then press the recessed FW button on the right end cap with a pen or paperclip. Programming takes ~3 seconds; MRCC restarts automatically. After updating to v1.1.095 or later, clear old MRCC USB device names from your DAW and OS.