South Alps1 firmware update and options

1- I need firmware update for South Alps1 GNSS system. On South website i cannot find from where to download new firmware.

2- In the specs it says that it Has Galileo HAS. I cannot find the option.

3 Glonass G3 (L3) is not staying active after restart.

4- in the menu it has X-fill (does it works? Because is not stay active after restart)

5- How to activate NMEA?