Like Chris said, the github version is highly experimental and in fact, I am scrapping the tool database thing and going another direction. If you wanted to use that version without the tool database function, it's rather easy to remove. Simply delete all references to self.tool_db and for completeness, remove the layout_tooldb layout in the UI file. Also remove any lines with get_checked_pockets. (there should only be one) I will push a sanitized version in the next day or two.
Jim