I would also recommend this if someone has the mapleroyals setup. In the compatibility mode select the reduce color mode (windows 10 in my case). It helped me. Before that I've got the error or program stopped working issue. (I don't know if someone already posted recommended this option this but I'm to lazy to search )
And sir, where do you find v83 Maplestory on Nexon website, given that GMS is already way beyond that version? Joke aside, no, you can't because of how the client is packaged to work with the server. You can't just take a client from elsewhere and use it directly for MapleRoyals without editing the client's information, if that's what you're asking.