A new article has been added to the Customization Articles area.  It covers the new CPM in PS 12.1 and covers most of what is covered in the other article on the older version, but has some updated information and new screenshots.

FYI - people have reported on PSUG (https://groups.io/g/PSUG/message/167251) some issues with opening some folders in the new CPM.  The issue has been identified and should be fixed in a future release.