I have made an observation:
This is without an Internet connection to the LAN.
My 6400M when starting up attempts to startup in the same way it was last running. In other words if I was running Standalone it attempts to startup standalone (going directly to the panadapter/slice display not asking for version), and if I was running SmartSdr for Windows by a computer connected via the LAN when I shut down it attempts to startup by looking for the computer it was previously connected to prior to being shutdown.
A second observation (which only occurs if I was last running smartsdr for windows on my computer) is that if this startup fails to find the previous way it was operating(for example my computer running smartsdr this time is Off) then it shows a Please Wait .... on the display while it tries to startup in the same situation it was shutdown last, and appears to be blind to any other way to startup (at least for over 5 minutes)
A shutdown and restart after this Please Wait ... display causes the 6400M to realize hey maybe the last successful startup is not the way I need to startup this time, so now I will look and ask the loose nut (me) behind the touch screen how I should start this time. (So I press connect and we do the Standalone startup thing)
Additional Detail Added:
The second observation is if the last successful startup was completed standalone and this time I have my computer and smartsdr for windows running when the 6400M was powered up then it connects to Smartsdr for windows.
This is an observation only not a criticism and I am looking merely to understand and for confirmation from Tim that indeed this is the behavior the M series is meant to exhibit.