I unscrewed the lock from the inside. The only issue was that one screw was obscured by the side of the screen door but it was close enough to the edge that it could be removed. It left scrapes on the screen door, but only minimally. Then used needle nose pliers to pull the latch bolt back and the door opened. Until I replace it, the door won't stay closed unless you use the deadbolt to keep it shut. But it does open and you can lock it so it's not too big of a problem.