Quoted from PatS:I'm going to wait to hear back before trying anything, but just to let you know, I cannot figure out how to remove the pins...
You will either need a pin extractor or a very narrow tool/pick to carefully bend the pins inward and then they will slide out. A very BRIGHT light helps too.
To me, your connector definitely looks to be wired improperly for USA. As to how it worked before? Shit happens.