Orphaned PLEG Scenes

When I first started with PLEG, I made a few wrong decisions as I was figuring things out. I deleted one of the PLEG objects so that I could start over. I just noticed, when setting up another item, that it appears that some of the old PLEG-generated events are still “out there” but not generally visible in the UI. I see items like:

ProgramLogic_15

Is there a way to clean these up?

If you are on a recent version … they should get clean up when you open up any PLEG/PLTS instance.