The Launch Control XL 3 has a bootloader mode that allows you to view the current FW versions, enable/disable Easy Start and set the device ID. To access the bootloader hold the Page Up and Down buttons together whilst powering up the device.
The screen displays the current Application and Bootloader version numbers.
The Record button toggles Easy Start. When Easy Start is ON, the Launch Control XL 3 shows as a Mass Storage Device to provide a more convenient first-time experience. You can turn this off once you are familiar with the device to disable this Mass Storage Device.
The Play button starts the Application.
The fader buttons set the Device ID to 1-8. Launch Control XL 3 appears on your system with the device ID appended to the device name. This can be useful when using more than one Launch Control XL 3 simultaneously.