[EricH]

I think you're talking about after it ends...

I can think of a couple of ways. The best one might be to have a "fire" signal trigger right before the end of the match, thus disarming the launcher--I've seen this done with pneumatics before. Another that would work would be to have a locking pin (with a "Remove Before Flight" streamer attached, in case of leaving it in robot before matches) to hold the launcher back at any time it's armed and not to be fired, bring it back to the pit, and reverse the winch slowly with a command off the driver's station after powering back up.