I recently got Arena and had difficulties with the controls, so I began to change the controls to my liking. I must have accidentally done something wrong because now I can't open the key mapper by pressing Ctrl+F1, and I can't use Alt+Enter to alternate between windowed and fullscreen. I've uninstalled and reinstalled Arena and that didn't help. There's a BAT file named Reset KeyMapper, I tried opening it but I honestly have no idea what to do with it. Any help would be greatly appreciated.