SDR++ compiled with modded rtl-sdr library https://github.com/Mr-Precise/rtl-sdr
tunes down to 13 mhz or lower.
NEW: experimental SDR++Clean MinGW/GCC/Linux port/build for Windows 7+
NEW: experimental SDR++Clean portable build for *ubuntu 20.04 amd64
Support RTL-SDR: all china / V3 / V4 (not tested)
Support RTL2832U SDR with modified vid/pid in EEPROM (1209/2832)
Other fixes