I've redone the experiment myself.... cooled the water and watered indoor plants.... both survived and no difference... sprouted seeds as well...no difference as long as you cool the water to room temperature.
I threw out the microwave and am not for a second sorry. Too much came out at first and now it is being annulled of which I do not accept. If and a big IF the thing is not detrimental to every thing put in it, it sure is to any close around it!