pressing of "export" option have 2 little issues :
don't ask if you want to overwrite over old files , and just overlap them no matter what.
i think you should make "ok" / "cancel" option dialog box to overwritten these files
restore the last selected values of of Map/Tiles/Colors .
i think its all better to show the dialog screen like the first time when i press "Export" ,
so the behavior will be consistent
pressing of "export" option have 2 little issues :