Doing the update is no problem. Installing the altera sw and the proper driver is where the difficulty is.
You can get the altera sw here
https://onedrive.live.com/?id=636DC4E8060D66A1!172&cid=636DC4E8060D66A1
And as for installing he usb blaster driver, first you may have to uninstall a driver automatically installed by windows. To do this, you have to locate the corresponding item in the device manager (unplugging and replugging helps in that the item will disappears than reappear from/in the device list) and use the popup menu to select the corresponding choice.
Then use this link to manually install the driver from the altera installation directory (your have to have the altera sw installed first of course) :
https://www.driverscape.com/articles/how-to-install-a-driver-manually
Then use Kingwa's procedure for the fw update. Avoid touching the red button while the DI20 is turned on, it will reset the amanero fw....
Then follow this procedure below. The update connector is at the back, no need to take off the cover. The di20 needs to be turned off while plugging/unplugging the cable. The indentation in the connector goes upward.
http://www.audio-gd.com/R2R/R8/R8updateEN.htm