Open WP9 to a blank screen

When I open WordPerfect 9 it shows the last file that was opened when I closed WordPerfect at the end of the previous session. Could someone please tell me how to open WordPerfect to a blank screen? In settings my default file format is WordPerfect 6-X9, with a checked option to save the original document as a backup at each save. The theme is WordPerfect Office.