Normally, you can control whether PeakHour launches at startup via Preferences > General > Launch automatically when computer starts.
Sometimes, this mechanism can become confused. If you've disabled this setting in Preferences, but PeakHour is still launching at startup, follow these steps:
- Open Terminal (click the Spotlight / magnifying glass icon in the top-right corner and type 'Terminal' and hit Enter).
Enter the following command in Terminal:
In the output above, the login helper is present and enabled.
To disable and delete the login helper:
Note: Enter your macOS password when prompted.