Title pretty much says it all....
They are (as long as you check the right boxes when doing the backup).
https://www.gpsoft.com.au/help/opus12/index.html#!Documents/Backing_up_and_Restoring_Preferences.htm
Excellent. Then would I be right to assume that the custom button I use to make a backup will include the miscellaneous data, because of the included "all" ?
Prefs BACKUP=all TO ****** Quiet
Yes, that's what the manual says "all" does with that command:
https://www.gpsoft.com.au/help/opus12/index.html#!Documents/Prefs.htm
Thank you.