I am hung up at how to create the StyleModule0.py as listed in the tutorial excerpt below:

[The ViewMap is now ready, we can write our Style Module. Let us create an empty file named "StyleModule0.py" in which we'll write our style module. Then, display the Style Modeler window using the Windows > "Style Modeler Window" menu item, and press the '+' button that opens a file browsing window. Load then the "StyleModule0.py" file. A line with the StyleModule0.py is now visible in the Style Modeler window. Double-click on this line to make the Editor appear. We'll write our Style Module using this editor. Any change made in the file can be saved using the "save" button.]

If I open the style modeler window, it is empty thus nothing to edit.
If I attempt to open a style it closes the program.
It appears I am locked out of the command line window that opens with freestyle

So any elaboration of the above paragraph from freestyle would be greatly appreciated!
Thanks,
David W.