Having made a complete mess of a Pan/Crop effect, I find I can't actually delete the effect.
I've tried clicking on the Section Box and selecting "Default", but the effect is still there and the Pan/Crop indicator on the clip is still green.
The Remove Selected Plug-in button is greyed out in the Video Event FX dialog window, so I can't remove it that way and I don't know what else to do, other than remove the affected clip from the timeline and then re-add it.
Surely there must be a simpler way?