Well I've decided to take the plunge and updated my ASIAIR Pluis 32GB model from app-firmware 2.1-10.74 to app-firmware 2.4.3-12.xx (not sure of the last two digits right now). So big update for me.
I only do unguided EAA using Live Mode for Live Stacking (so my experience will be different but there will be areas of overlap).
I have C8 SCT with f/6.3 Reducer, HEQ5 Pro Mount, and an ASI294MC Pro camera (cooled to 0°C). I'm in the Southern Hemisphere and have a view of the SCP so have not turned on the option to use All Star Polar Alignment nor have I turned on the option to use New Plate Solve.
My process for updating the ASIAIR was as follows:
Disconnect everything from the ASIAIR
Connect power to ASIAIR
Turn on ASIAIR and wait for a minute or two
Connect to ASIAIR Wi-Fi with my phone
Launch ASIAIR App (2.1) on my phone and connect to the ASIAIR
Go to the "i" menu (I think) and choose the option to Reset Firmware. Confirm this reset of the ASIAIR Firmware back to it's original, old, firmware.
Once the reset is done - click Next but don't upgrade yet. Exit the ASIAIR App on the phone and close the app. Leave ASIAIR itself turned on.
Complete uninstall the ASIAIR App from phone (I went to the settings for the App, cleared cache, cleared storage, then uninstall).
Shut down phone (not restart). Wait 10 seconds. Turn phone back on.
Install latest ASIAIR App (2.4.3) from Play Store. After install - check to make sure auto-update of the ASIAIR App is turned off.
Don't connect to ASIAIR Wifi yet but Launch the ASIAIR App on the phone. I allowed access to location information for the app. Tapped on location info (not Enter Device) to check location info was correct. Good to see that you can edit location information here. Confirmed the info then tapped Enter Device. Waited for it go through the inital unpacking process before showing the screen that it couldn't connect to the ASIAIR. Exit the App. Close the app.
Connect to ASIAIR Wifi on phone.
Launch the ASIAIR App and connect to the ASIAIR. Upgrade the firmware.
14. Important step: around 35% it appeared to hang but what actually happened was the ASIAIR had to restart. When this happened - my phone connected to my home Wifi. So I waited for a 5 minutes or so - swipped down from the top of my phone and tapped on the WiFi icon to change the WiFi network from the home WiFi to the ASIAIR WiFi.
When connection was established the ASIAIR upgrade automatically refreshed to show the firmware upgrade was successful.
Confirmed it and checked I could launch the app properly and connect to the ASIAIR etc etc.
Went to the menu in the ASIAIR and chose the shutdown option.
Exited the app and closed it off.
Waitied 5 minutes before powering off the ASIAIR.
Will test it when I next get the chance.