My settings in “Editor preferences” are not saved, on every relaunch one needs to go all over again, what’s even worse, to overcome this I tried to save my setting to file but figured out that only small subset of settings can be imported back.
I googled out this issue and it looks this problem is present from long time ago.
for example:
https://forums.unrealengine.com/unreal-engine/feedback-for-epic/1355641-vast-majority-of-editor-preferences-does-not-save