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in the Edit > Preferences > Now Playing screen you can set the preference - just choose 'clear list and play all tracks'you can also use the auto-DJ and have it add random songs
i made an improvement in the one of the recent 1.2 betas which is after the version on the downloads page. If you get the latest from the 1.2 beta topic, there is now a button 'Start DJ' that does what i think you want