PLEG schedule stuck in true - hoe do i turn it false ?

I have a PLEG schedule, which did not turn off when it should have been. I can press the do it now button, but that would only turn it on (which it is already), is there a way to turn it to false manually ? Otherwise my hot water will not come on automatically tonight… as its true already

Schedules
HWOnWD1 Weekly 21:55:00 1,2,3,4,5,6,7 None Weekly 22:18:00 1,2,3,4,5,6,7 None true 2014-07-07 21:55:00.103 2014-07-06 22:18:00.101

that should have turned off yesterday (7th at 22.18)

The “Do It Now” button will toggle the state of the timer.