The main window is visible as soon as you start KMLOCfg.
The main window of KMLOCfg contains a menubar, a toolbar and a statusbar.
The function of the menubar is explained in the Menu Entries Section.
The Toolbar provides short cuts for some of the menu commands. Some of them are only available while a facsimile file in the list is selected.
The statusbar gives you some brief hints of what's going on.