Yes, there are tutorials available for this application, but they're all put in one single file available in various file formats like: PDF, ZIP, EPUB, Mobi. These files are available for downloading from the official website. There is a tutorial page that summarizes all the tutorials available for the application. There is also a Table Of Contents section to see exactly what is found in the tutorial database.
Download page: http://www.faststone.org/FSIVTutorial.htm