My opinion only.
I hated the way everything was done. Not intuitive with stuff everywhere.
Most other CAM packages are the same. 5hit everywhere. (tricked their dumb filter)!
Your lost function(s) has probably got a new name, or is it like ACAD dumping IGES format years ago, but leaving mention of it in the help. Grumble..
PCB layout software has a habit of making good things go away too.
I'm going to learn lisp. I think that's easier than some weird interface concept, by a programmer who has never run a CNC in anger before.