A Kant Generator Pro module is made up of references and instantiations.  A reference will resolve to exactly one of its instantiations (picked randomly while generating).  An instantiation, in turn, can contain references (which will then need to be resolved) as well as plain text.  See the “Syntax” help page for complete details.

To open an existing module, select “Open module...” from the “Build” menu; to start a module from scratch, select “New module...”.  The module editor will display a list of all the references (if any); under each reference is an indented list of its instantiations.