Yes, as Randy I am not looking at the system now, but based on my memory:
- system, information view should have information on your version, and with more details like how many git commits behind you are, thats a details really, like minor fixes we commit to git between versions.
- if you go to the power menu there should be an option to reboot and update picochess, expect the next boot to take 10-15minutes. As Randy said, be patient. So yes, you can update via wifi.
- there is also an option to replace engines on next boot, but I dont recommend using that if you have a well working system. If you do use it, expect again next boot to take 10-15 minutes.
— Johan