Procedures:
1. Open the top cover. 
2. Use a USB cable to connect between the front screen board USB port and a Windows PC.
3. Turn on MP-DX power.
4. Run ESP-Flasher.exe, select the right com port and MP-DX-V2.5.bin file. Click on Flash ESP.
https://www.musicalparadise.ca/files/ESP-Flasher.exe

Changelogs:
1. Fix firmware update over WiFi bug.
2. Add NOS (Non oversampling) mode for ES9039MSPRO DAC modules. ES9068AS is not applicable since it doesn't have NOS feature.
NOS mode can be turn on in the screen menu. To access the menu, long push the rotatory knob for about 5 seconds.
Then, single click on the rotary knob until "NOS Mode" shown. Turn right or left to turn it on or off. 

If you use up-sampling feature in a player software, such as Audirvanna, Roon, Jriver, HQPlayer, it is recommended to try NOS mode for better sounding performance.   