Using Windows 7 and VE Config: Under special no listing of MK3USB (only MK2USB) , this has been described by several other posters here. Nonethe less, followed Mathias advice: save files, opened them up under device manager but again no MK3USB file to update. Cant use my Victron Multiplus Compact to charge my Victron Lithium batteries (which is mind boggling that the Multiplus doesn't have an easy preprogrammed lithium setting). Any help on this would be greatly appreciated. Thank You.