Awesome. Works like a champ. And for the sake of prosperity, I'll add the following.
The path that came up in the Finder for me was:
/Users/{my-user-id}/Library/Preferences/com.camerabits.PhotoMechanic/RenameDialogSettings
in case anyone wants to navigate there. (I don't know why you would with the Option+click, but just in case.)
Also, I did not have to restart Photo Mechanic, which is great. The next time I opened the lightning bolt dialog, the ones I trashed were gone.
Thanks,
-stimpix