Allocator, you won't see any aircraft without ADS/B, as they're not output on port 30003. Try using a recording file instead, although that's 5-minute delayed of course :(
OK, I'm with it now. I misunderstood the reading of the recorded file as an "after the event" off-line type function.
I've got RB and SquawkBox running and I've selected RB Recording. I've selected "Load a Recorded File" in SquawkBox and now I'm seeing the data (5 minutes delayed) as advertised, including the aircraft without position data (see ZH537) - excellent.
I've got all my military code blocks set up in the SquawkBox Alerts to give me red text so that it shows up well. I've also got 7700, 7600, 7500 set to give a colour change and an audio alarm.
Of course, it would be better if it was live, so a RB option to output data live but without position information, would be very good here.
I'm liking SquawkBox more and more :-)