Since installing the lkatest build, the option under 'Tools' for 'Auto-numbering Wizard' seems to have disappeared altogether, and I cannot seem to find it in the 'settings' dialogue either.
It's there under version 3.16 but totally gone in 3.20
That'll teach me to read the notes (which I obviously did not) & not seeing it in the accustomed place just threw me so I looked in 'Settings' but did not see it on the actual toolbar either.