No "Toggle Shapeoko Homing" button visible after updating XL to CM4 and GRBL1.1

To revert to CM3 see:

To get homing working, it should “just work” — verify your settings against: http://docs.carbide3d.com/software-faq/shapeoko-3-default-grbl-settings/ and see if http://docs.carbide3d.com/shapeoko-faq/shapeoko-enable-homing/ helps.