I have started playing MapleRoyals 3 weeks ago, everything works fine until last night. This morning, when I launch MapleRoyals, the sounds are playing as usual but the screen shows nothing and cannot optimize the MapleRoyals window display. My screen went back usual after I press ALT + TAB to switch window or ALT + F4 to exit MapleRoyals. Note: ALT + ENTER didn't work for me, it doesn't in switching into window mode. Been finding out how to solve this for 3 hours+, helps are much appreciated. Thanks in advanced.