This version is special because around this day it's some kind of holiday for me.
Grayed out options are disabled or optional (if enabled/available), and more visible are needed or they're switching the way of how it works, so I hope it will be more understandable.
In the business version added option to reconstruct existing 7-zip installers with different themes, also changes installer icon (if selected icons to change).
Beware - some command-line parameters was changed, so modify your scripts if you use prepared yourself.