In Missionplanner 1.3.8 Setup/ Install Firmware Rover Version 4.2.3 ist still marked as "stable"

I understood, 4.3 is now defined as stable?
Or even soon 4.4.

4.2.3 is stable
No 4.3 is not stable.
4.4 will be the next stable

Thanks for the quick answer. I installed 4.4. beta and the issue I posted in 4.2

ServoX_FUNCTION no Output with RCINxScaled

is now solved.