IF it could be done while there were users in the file.
Unfortunately, I just found out that it can't. So it's no more useful
than just adding or removing the trigger (indeed, worse, because
PRTTRGPGM doesn't indicate anything about whether a trigger is
deactivated), and looks like the result of somebody in Rochester having
WAAAYY too much time on his or her hands.
And in this case, unless there's something else besides CHGPFTRG that
will put triggers into a disabled state, somebody at the customer went
to a LOT of trouble to turn Workflow off while making it LOOK like it
was still turned on.