After login to your “myWaldorf” account you can find the firmware downloads under “myHardware”

Copy the „M_Host_Firmware.dfu“ file onto the root directory of a SD card.
Insert the SD card into M’s card slot.

Switch your M off.

Hold down both Bank/Part buttons and switch M on again.

The firmware update should be recognized automatically.

To start the firmware update process, press the OK button.

After the firmware is installed correctly, M burns it into its FLASH memory.

Wait until the operation is completed. If updating was successful, the M will perform a system reset and start by pressing the OK button again.