I posted this and then deleted it because I solved it enough for my purposes. But I am reposting because others might be affected by this behaviour.
I wrote: “A few days ago when I last used DO PhotoLab 8 I could export images. Now the whole side panel from ‘Export’ is greyed out. I am up to date with the software and I am on a Mac under macOS Sequoia 15.5.”
Now I see that ‘View / Dock Image Browser (Cmd U)’ hides the dock to make more space to process the image by hidingthe thumbnails of the other images also hides the blue button to ‘Export’.
But unhiding the dock does not solve the fact that under ‘Image / Export’ these items are greyed out. And why is the Blue Button hidden when thumbnails are hidden?
Export to Disk…
Export to Application…
Export to Lightroom…
AirDrop…
Mail…
Messages…
Notes…
Freeform…
Reminders…
Dropbox Transfer…