The File Types branch under Configuration allows the list of file types that appear in the File Open and File Save As dialog boxes to be configured as follows:
Up to 10 file types may be configured. These file types will be shown in the file operation dialog boxes in the same order they are shown on this page.
Each file type configured consists of a file name and file description. The file name may (and probably does) include wildcard characters and may include multiple file extensions each separated by a semicolon ";" (i.e. "*.c;*.cpp"). The file description is a text field describing the file types.
This dialog also provides a DEFAULTS button that resets the file types to the initial settings.