La versión para linux está en
https://github.com/AlexandreRouma/SDRPlusPlus/releases/tag/nightly
El .apk para android en:
https://github.com/AlexandreRouma/SDRPlusPlus/releases/download/nightly/sdrpp.apk
La versión para windows 64 bits:
https://github.com/AlexandreRouma/SDRPlusPlus/releases/download/nightly/sdrpp_windows_x64.zip