Navall 3 was there ever any update for it?

[BigAde]

Having only recently upgraded from a Navall WinCE to a Navall 3, I'm experiencing one or two issues that from reading around seem to have been experienced by others.

• Brightness set to Automatic - screen goes black when headlights are turned on.
• Brightness set to Nighttime - screen goes black until power off/power on.
• FM Radio stations seem to lose presets sometimes
• No microphone input selection on General Settings menu

There was a lot of talk about a potential update to the Navall 3, but that all seemed to go quiet. Was there ever a fix or a workaround for these issues? (I've set brightness to Daytime for now).
Would a different radio app to the default one work any better?
My internal microphone seems dead which I'm assuming is because there's a hidden setting somewhere where the external microphone enabled.

Appreciate any help or pointers.