How do I remove this threshold from my exterior door???

I need to replace the rotting wood under the threshold, but I'm having trouble removing the threshold. See photos. Unfortunately the 2 screws shown that are used to elevate the threshold are stripped. I'm able to get under the threshold with a screwdriver, but it won't pry off. As you can see from the second photo, it's wedged pretty good under the side of aluminum siding. Any suggestions? I'd prefer the keep the threshold after replacing the rotting wood, but don't absolutely have to.

Thanks!


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How do I remove this threshold from my exterior door???