My brother wants to play on the server but sadly, the MapleRoyals app is gone as soon as its installed. Is there any way for that not to happen?? Thanks. btw, it's windows 8
I guess its your firewall or your antivirus, try turning them both off. You can make an exception for Mapleroyals in your antivirus.
I use Windows 7, but I had the exact same problem. It was my antivirus that was deleting it. Turn it off, run MapleRoyals (download it again if you have to) and add MapleRoyals.exe to your antivirus exception.