I upgraded all the software on the boat electronics I could about 2 months ago. That means V4.5 for my Zeus 2 plotter and anything else that was recommended.
After doing this, the WIFI-1 stopped working. By this, I mean, the plotter couldn't see it. It was however, still transmitting on the SSD I setup but the Zeus refused to acknowledge it was even connected on the bus. I tried shutting down the boat power to reboot it, no joy.
The dealer ended up replacing it with another one and that worked straight away. I don't believe the other one was broken but this is what it took to get the plotter to see it again.
I can now connect the boat to a WIFI hot spot, download updates (which I did) as well as predict wind weather straight to the plotter. I just have one WIFI-1 on the boat so it's the hotspot or reconfigure it so my tablet can be used as a remote plotter display.