How to reset a lost pin on a Mac

1. Quit LumaBooth completely (Cmd+Q — make sure it's not still in the Dock).
2. Open Terminal (Applications → Utilities → Terminal).
3. Run these two commands:
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defaults delete co.lumasoft.lumabooth PinCode
defaults delete co.lumasoft.lumabooth LockEnabled
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4. Relaunch LumaBooth — the lock PIN will be gone and everything else will be as you left it.
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If either command reports the key doesn't exist, run these instead (note: this resets ALL app settings):
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rm ~/Library/Containers/co.lumasoft.lumabooth/Data/Library/Preferences/co.lumasoft.lumabooth.plist
killall cfprefsd
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Then relaunch LumaBooth and set things up again.