How do I turn off the automatic creation of a blank drawing on start-up?

I can't figure out how to do this.  Since I commonly use the File/Publish command to create PDFs, it gives me a list of all the drawing that are open, along with its model space and layout tabs.  The blank drawing is included, and must be deleted before I publish.  So, I would prefer that it not be there.

I imagine there is an option to turn off this behavior, so that BricsCAD just starts without the blank drawing.

Thank You,
-Joe