• restart ?-d delay?
Quit the application and restart. If the user cancels the quit operation (during the review of unsaved documents), then the command is aborted.
The -d option specifies a delay in seconds before restarting. The default value is 2 seconds.
Technically, to perform the restart, Alpha sends an AppleEvent to an internal helper application called AlphaUpdater, then quits. The helper application asks the System, after the specified delay, to launch Alpha.