strange, my version also say's V 6.00.000
but i use the "/connect" addition in the target field of the shortcut to "bypass" that screen
the command line for that shortcut looks like this : C:\AirNav Systems\AirNav RadarBox\ANRB.exe" /connect
i never tried it with the regular way to do it ( and after reading this i'm not planning to ), one of the first things i do when installing RB is altering the shortcut this way.
as said, i do not use a dongle, just the good old RB box, here is a simulation as if i would use my laptop "in the field"
: disconected my laptop from internet and launched RB ; see the screenshots
1) property screen of the shortcut
2) start-up screen : see NO internet connection
3) program running V 6.00.000, still no internet connection,
just like it runs like i use "in the field"