File window list reset?

 From:  mat10x
8721.1 
Hey guys,

Super basic question...

How do I clear/reset the "File" window...bottom left tool bar button that pops open with your recent list of files. Want to clear out some of the files from the list that I'm not working with.

...and is there a way to have my most recent file at the top of the list, rather than at the bottom?

Thx!