Fixes a launch crash in v0.2.0 — thanks @loewal for the report (#16).
v0.2.0 accidentally linked librtlsdr and libusb as dynamic Homebrew libraries instead of statically. On any Mac without Homebrew (or with a mismatched Homebrew version) the app crashed instantly on launch with dyld: Library not loaded: librtlsdr.0.dylib — so no menu-bar icon ever appeared and nothing happened. Even on machines with Homebrew, the notarised hardened runtime rejected the dylib for a code-signing Team-ID mismatch.
v0.2.1 links both statically again, so the app is fully self-contained — drag it to Applications and it just works, no Homebrew required. Everything from v0.2.0 (Opus audio, fullband mono, the spectrum bin lever, robust single-listener handling) is unchanged.
If you downloaded v0.2.0, delete it and grab this instead.