Select your COM Port
Deselect DHCP if you have not setup IP VU + duo
Then click on Connect button
Now you should see Serial port open Please turn on your box.
Do this with on power switch For Ethernet Flash Tick DHCP is set next Click on Set IP button and enter your IP
Now youll see "IP Setup Success" in the VU + Util
Click open and select your NFI image file.
Press the flash Button
VU + Util then says "Reading file, please wait a moment ..."
Wait till you see flashing process is completed
Now the update is finished and you can disconnect and then finish with a Click on the Exit button VU + Util.
Now power off then on.