A few days ago I *booted* everything up. No settings anywhere had been changed from earlier times when using FT8 and WSJT successfully. But now WSJT is not decoding any incoming signals. ¨

Hi Tom,
Could it be so simple that Windows has changed security settings and don't allow microphone? I am assuming that you are using Windows 10 or 11.
It is in security settings something like Allow applications use microphone (I am using Finnish version, hi) and allow wsjt-x us it.
73, Reino OH3mA