Notchy is frozen or not responding — how do I quit it?
Press ⌃⌥⌘⎋ (Control-Option-Command-Escape) to force-quit Notchy — it works even while the app is frozen. Notchy isn't in macOS's own Force Quit list because it has no Dock icon. Then open it again from Applications.
Good to know
With “Auto-Restart if Frozen” on (the default), Notchy restarts itself after 12 seconds without a response. If it freezes twice within a few minutes, it asks before restarting instead.
Both switches are in Settings → General → Recovery, along with “Restart Notchy” and “Force Quit Notchy”.
A freeze report is offered next launch — sending it is the fastest way to get it fixed.
Updated
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