This list shows all files of the current directory which match the pattern. Here you can select all the files you want to rename (or the files which you want to give their old names).
Doubleclicking on a directory changes to the directory.

If you press the right mousebutton here, you get a popupmenu that provides you with some more possibilities.

Further you can mark some pictures and doubleclick on them. This starts a subtask that shows the selected frames one after the other with your prefered viewer, while you could continue to work with ProRen. ProRen may only be quitted when no more pics are to be shown.