One low beam headlight burns out. You do not want to drive one headlight, do not want to be stopped or fined for one headlight, do not have time, money, or tools to replace defective headlight.
So....
One quick fix, aim working low beam light on wall ( Two SPST switches on right show high level and lower aim points), note location. Now turn screws on high beam lights and turn adjusting screws on high beams and aim them downward to use as low beam lights.