You can change the centre frequency by right-clicking on the large round arrows in the frequency bar.
If you change band or centre frequency it affects all users on that device.
When not in use the receiver becomes an APRS iGATE on 2m.
SDR Device 1: RTL-SDR Blog V3. Antenna: 1 ele DAB @ 8m
SDR Device 2: Airspy Mini. Antenna: Discone in loft