Provided you haven't adjusted either headlamp aim using the onscreen calibration feature then all you need to do is enter the calibration feature - let the headlamps dance and then exit without adjusting, your headlamps will now have returned to their default setting.
But, If you manually adjusted either headlamp then upon exit what you have set is now the default and you will need to either pop into a garage/MOT station and have the headlamps reset or you adjust them yourself.
Some updates do screw the headlights up, and I've found it makes no difference if the car is on level ground when the update is applied - my car is always in the garage overnight - so level ground, and indeed when in the garage its the only place my car will lock onto the Wi-Fi signal - so all my updates are completed when the car is level - and still updates manage to screw up the beams.
I made a bit of kit up for aiming the beams from wood baton, right height and marks for each headlamps aim plus just down the road an ideal place to be able to park the car 9.5 mtrs from a wall to do the adjusting, Its on an industrial estate so weekends are ideal to do it. You can find the instructions online using tape to achieve the marks but that's a faff - so i built the kit which simply folds out - place against the wall, reverse the 9.5mtrs and set each headlamp up. You are not too far from me (Wigston, Leicester) so If you want to pop over I will set the headlights for you.
Once they are set any future update that changes the beams can be rectified easily - enter the menu - watch the dance then exit - job done.