How do I stop the music that accompanies jmonkeyplatform?

I’m running jmonkeyplatform for the first time ever. There some spooky techno music that accompanies it. How do I turn it off?

Just select the “dont show again” checkbox after you have clicked the monkey in the welcome screen. Or open any model in jMP so that the Scene is occupied. If you cannot see the welcome screen, look in the comment here for a hint how to disable it still.