I got some useful information from support today, that controller/transmitter settings can be saved and restored on the MacOS version by simply making a backup copy of the settings folder:
~/Library/Containers/com.aerofly.aerofly-rc-7/Data/Library/Application Support/aerofly RC 7/
The TM.log file is also saved in this folder which gives some valuable clues to the last few steps what the program was doing in case you want to troubleshoot something. The file can be open with any text editor for viewing.