Last night I tried to get an AF series and store the images for later inspection.
I went to Settings->Developer and checked the box 'Save Focus Images', applied the change and quite and restarted KStars.
Then I did a focus run (linear, all stars). But no images were written to disk, as far as I can tell
I looked in .local/share/kstars and in my default data directory ~/EKOS.
Is the option not working, or are they somewhere else?
This is recent kstars from git (self compiled) on a Pi4.