See attached video ......... when I want to click on an item it selects something else (with using mouse and touchpad) ........ and also when using KS9, the computer is soooooo slow!
I had this issue to, I think it was a delte all preferences and restart. The window positions got confused, and it also might have something to do with the HiPDI resolution display, make sure that setting matches your actual display.