I also am convinced that at least some files got updated.
With this update i got a new ingame lobby.
I don't know if that's the only thing they changed.
Also i think that Novalogic only changes the version number when they build an updated DFLW.exe executable. So as long as that the DFLW.exe remains the same, version number will stay the same. Even when they change some other files, like the ones for the lobby.
Just my 2 Eurocents
