Dave Sr. from SWISCO responded:
November 8, 2017
I'm afraid there's no easy way to remove a casement window lock once it's stuck in the locked position. You might be able to drill out where the screw is on the handle. That might release the lock, but I can't be sure. In my experience, your only hope is to find a way to cut the lock from the window, which is not a small project by any means. I recommend seeking the help of a local professional to come out and do the project for you.
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