1. Press and hold the small CHANNEL REC button (at the upper right corner) during power-up
2. Display will show "UP" (unit is now in "firmware UPDATE mode")
3. Open your MIDI Dump software (e.g. "MIDI-OX" on a Windows computer)
4. Select the firmware file for updating (file name ends with ".syx")
5. Dump the file via USB to the X-TOUCH ONE
6. The 7-segment display will show progress
7. The unit will show "donE" when finished
8. Now power off / on again
9. Display will show the firmware version, shortly, while booting