After DF has found a number of defragmented files, it lists them, by default, sorted by the amount of fragments. The files then can be sorted by the user by clicking on "Size", "Path", "Name" & "Fragments". But when the user re-starts DF then the program "forgets" the latest sorting order.
Suggestion: I would like to see that DF remembers on which column the files were sorted right before DF is closed and then, when DF is restarted, uses that info to sort the files again. Instead of always sorting on the amount of fragments, upon start up.