There is a comprehensive help file for PropertyWizard. It contains a ‘getting started’ tutorial and a complete reference to the formula language.
The App Store installer places a copy of the help file on your hard disk here:
C:\ProgramData\Autodesk\ApplicationPlugins\DavidWoodDesign_PropertyWizard.bundle\Contents\PropertyWizard_Help.pdf
And you can download a copy directly from the website here: