We are really sorry for such a delay! I see that you purchased Moto CMS HTML template that can be edited using Control Panel tools. Source files are required for Flash based templates as some animations can not be edited using Control Panel. Moreover there are just flash source files without .PSD.
Thus both types of templates (flash and html) are generated in the same way that's why there is empty folder for source files in HTML template package.
Thank you for understanding!