The values of a PropertySet can be accessed in Script Events and also in text fields of actions that support FinalBuilder variables.
Accessing PropertySet in Script Events
The syntax to access a PropertySet value in script is:
<PropertySetName>.<PropertySetValue>
VBScript
msgbox MyVersionNumbers.MajorVersion
Accessing PropertySet in Action Fields
The syntax to access a PropertySet value in an action field is:
%<PropertySetName>.<PropertySetValue>%