Hi there Michael,

FWIW I too have been having issues with deselection, as ctrl-drag (= rectangle marquee) never did it for me as far as I can remember - only regular ctrl-click does it. But seeing the question being brought up in this thread made me look into it again, and it seems like the problem might be coming from the "multiple selection : only with shift key" option from General settings.

What I am observing is :
"multiple selection : only with shift key" ON = ctrl-drag deselect impossible, as everything gets deselected instantly.
"multiple selection : only with shift key" OFF = ctrl-drag deselect possible

I would assume that quite a few users might want "only with shift key" to be ON, since it is the selection paradigm used in a huge majority of design software ; so unless it is something else causing a conflict for me and the OP when it comes to ctrl-deselect, this issue might be quite widespread.

However I am using quite a few custom presets as well as Autohotkey scripts running in the BG, so perhaps the behavior me and the OP are seeing might come from something else altogether.

Thoughts ?

BTW, on a semi-related note : since I never really tried it before I had some playing around with "multiple selection : only with shift key" OFF - and while it is interesting, I feel like it conflicts with the way MOI lets one deselect things by clicking in the empty space. Because that means that someone who actually wants to select multiple things without having to press shift will very likely lose their selection if they work fast.