If you are not transmitting and only using an sdr just get SDRangel. Its free, is made for sdr dongles, has almost all the decoding and plug-ins you will need. SDR is fun and programs have been free and around for a long time. There is no reason to spend money on paid programs because the features you can use with an sdr are free already, and the extra features in the paid program you cant use with an sdr anyway. Wait till you look at the prices on antennas and amplifiers to increase the range of your Sdr haha. You can’t download more range.