Since 16.2.4 was loaded I have a couple of things that no longer work, has anyone tried to load 15.4.7, the older version? I am hesitate to attempt it unless someone else has done it. Dynon says they will have a fix at some point.
Rolling the software back is possible but requires two files from Support and then you will need to do a Force Network Load to get all the modules back to the 15.4.7 version. I did this with my systems because I find the version 16 VNAV solution unsatisfactory in both arming and display. It works the same once engaged but I also think there is a possible safety issue for a distracted pilot because of the display.