Thanks for the clarification

After playing a little bit more with the problem, it seems that starting Setpoint as administrator fixes the problem (I have no idea why, though)

Sorry for the really late answer - yes, I have the "Run as administrator"-option checked. (Manually starting as administrator doesn't change anything, too)

When I first installed Dexpot, I used the "horizontal-scroll-to-switch-desktop-feature" from the mouseevents plugin to switch between desktops, and it worked pretty well. But after I installed the SetPoint-software for my Logitech mouse, this function stopped working reliably. After a few ...