My list of recent files doesn't update when I add new files. How do I clear the list of Recent Files on the opening screen?

Check File->Recent Files menu. It's where you can clean the list up or just remove obsoletes.

I did that, but it has no effect on the files that appear in the center of the screen when I first open the program.

UPDATE: I did that before and there was no change. But when I do it today, it worked. Thank you. The glitch fairies must have been out before.