MCT-220-24
Disconnect APP from turntable.
Install the driver for the turntable in your Windows computer. This is needed for the installer .exe to work.
Plug USB from turntable to a PC running Windows
Run the exe linked below to update the turntable firmware
Use the latest version number.
https://www.dropbox.com/sh/ueye9l2i9woglon/AAC4k5vKWmqFEsOExsmu9PYEa?dl=0
This video shows what to expect during the firmware update.