In the adjust dialog box, the clickable space of the sliders has been narrowed down, we need to click in the very tiny (about 4px high) horizontal line in the middle of the slider. The space immediately under and above that is between the button's bottom and top are not clickable anymore.
I show in this picture the space that I would expect to be clickable
- xnview sliders unclickable space.png (37.7 KiB) Viewed 84 times