[stumped]

i must be doing something stupid here, please help

i created a column - reading- added it to main view and populated it. all good until I quite calibre and restart, then its vanishes from teh main view- I have ot go to preferences, add column... to get it to re-appear again

in case it was my dodgy create, i tried also to add a predefined column - so I add date modified to main view... same behaviour, its there until a restart, then gone

they both survive quit to tray, but not a full quit.
am i missing a save button or something silly?
I use preferences, add your own columns, tick, apply, close.