@p-i: I also had problems finding the calibration menus when I updated to the new software. I have already given some feedback about this to the responsible team, but I will forward your user feedback as well.
Regarding having to re-calibrate frequently, under normal circumstances you are not supposed to have to do that. What do you mean when you say you swivel your monitor between two positions? So that light settings are different? Could a solution be to create two different user calibration profiles and just switch between them for the two different monitor “modes”?