For the EyeTV Netstream 4C, the firmware update does not work the same way as it does with the EyeTV Netstream DTT and the EyeTV Netstream Sat. There is no web interface involved.
In both the EyeTV Netstream app and EyeTV the firmware can be updated:
– EyeTV Netstream App: You will be prompted to update on app launch if the firmware is outdated
– EyeTV: In EyeTV Preferences> Devices there will be an update button if the firmware is outdated