Signed, notarised and stapled. Download, unzip, drag to Applications.
Fixes a slider that climbed on its own. In 4.1.7 the noise-reduction setting would drift upward by itself and stick at 100%. The server echoes the strength it is using and the page renders that back onto the slider — then re-sends it, which makes the round trip a feedback loop. The two conversions had stopped being exact inverses, so every echo multiplied the setting by 1.25: 30% became 38, then 48, then 59, and so on to the top. They are exact inverses again, and there is now a test that fails if they ever stop being.
Everything from 4.1.7 is included: noise reduction with a genuinely gentle end (a dry/wet blend on the spectral gain, and a floor that sweeps in decibels rather than amplitude), a watermark-free world map, canvas-drawn spot markers so panning cannot chop the audio, an audio watchdog that no longer disarms itself for the life of a page, and the IF-filter deadband that stops a sweep thrashing the tuner.