Reference > Menus > File menu > 
File > Open Recent > Clear History
 
 
 

Empties the list of files that shows under File > Open Recent.

This list contains files that were recently opened or saved.

Note

File > Open Recent > only keeps track of certain types of files. Shader files, textures, light files, and environment files will not be listed. However, any file that can be opened through File > Open should be of a valid type.