I've just downloaded the emulator, Visual Boy Advanced to run on my PC. I was playing with some settings and now when I launch the emulator it automatically changes my monitor from its native resolution of 2560x1440 to 860x480. I can change it back to naitive resoulution with nvidia control pannel but then the emulator doesn't show an image but I can hear sound and the game is running. Any clue as to how to try and fix this? I was running games fine before I was tinkering with it.