mcrxlover5

Hi. I'm new here, and I was tweaking my controls while playing and accidentally set "open SensorNet" to "button 1", then the game froze up and closed. Now that is the setting, and I cannot even access my worlds because every time i click any button or anything on the menu screen, it opens sensor net. I cannot figure out how to get into controls any other way.. Does anyone know how to reset default controls to fix this problem? Thank you