I’ve updated to 4.1 and the editor is basically unusable. The editor became extremely slow and it’s impossible to use it, even in the lowest quality preset. If I switch back to 4.0.2 the editor works just fine. So, it’s not my computer. Can you please verify this?

Your are right, Sorry. We will fix that soon. The workaround: put this into Consolevariable.ini: r.GraphicsAdapter = -2 Please respond so we know that fixed your issue.