Dump1090 on Win10 with RadarBox ADS-B Flightstick Dongle

Hi Folks,

Am a newby trying to convert a Bobcat Helium miner 300 into a box which can spot airplanes. To see if the default (small) antenna is usable at all,
I connected it to a RadarBox ADS-B Flightstick Dongle and Win10 box, replaced the drivers using zadig

Airspy gives me some kind of "noise" graphs but want to be sure that I can receive planes information so started to look at dump1090

When running:
dump1090.exe --interactive --net --net-beast --mlat --gain -10

I only get:

Found 1 device(s):
0: AIRNAV, ADSB_1090, SN: 00000010 (currently selected)
Found Rafael Micro R820T tuner
Using automatic gain control.
Exact sample rate is: 2000000.052982 Hz
Gain reported by device: 0.00

Hex Mode Sqwk Flight Alt Spd Hdg Lat Long Sig Msgs Ti-

No output at all. I haven't done any opening of ports in my rputer as I think this is not needed at this point, but am I overlooking something here ?
I know the antenna isn't the greatest thing but I would expect some flight information in the dump1090 output.

Any advice/help is much appreciated!