Latest BlenderCAM regular addon installation :
* download blendercam.zip and don’t extract it.
* In blender, go to preferences, add-ons, and select ‘install from file’ and select the blendercam.zip file you downloaded
Preinstalled CAM/CAD Blender :
* extract zip and execute blender inside extracted folder
* blenderCAM addon, CADSketcher and BlenderBoxes preinstalled