Thank you fir the question, Phil, let me try to clarify on my end.

What am saying is: older pythons that did layer adds don't work any more; generic users don't update or edit pythons or any files by opening them in text editors or otherwise, this function should either be built in or an updated Python 3 script that we can buy. I should not need to faff with text editors for adding layers to multiple matzones if this function is described in the manual as existing in the program.