C120 & Evolution Autopilot (ACU200/EV1/P70s)

[PetrelMarine]

I have a question regarding the current compatibility of the C120 Classic and the latest ACU200/EV1/P70s bundle.
From my interpretation from another post, it is my understanding that Version R4 has eliminated the ability to use a SeatalkNG/Seatalk converter for integration of an Evolution Autopilot with a C120, is this interpretation correct?
The post indicated a downgrade in software version would be required until a fix had been made in the next software version, however I do not see any revision reflecting this in the software history as of today?

Also, I noticed it seems like software upgrade/downgrade of an evolution autopilot via a C120 has been made unavailable. Does this mean that any upgrade/downgrade on this autopilot would need to be done with a different MFD?
Thanks for your help.