Ok so before the pope interrupted what I was gonna say, I was gonna say, "another day, another hour of work trying to open my window." I've now removed enough material to see the extent of the damage. With the paint on it, it looked like the bottom of the window fell flush with the sill, but in fact it falls into a groove, meaning it will not be possible to leverage it from below. And also, I have to keep digging at it, because who knows how deep the groove is and so how much caulking is still holding the window down. Maybe it would be easier to just call a building inspector and be done with it... Am I right or am I right?