KDE Single Mouse Click Annoyances
Having a single-click to select or open folders and files is annoying. Especially when you just want to highlite a file or folder.
I have also noticed that if you click an item on the start menu and move your mouse towards the desktop, a launcher is created because you moved the mouse so fast after that first click that you inadvertently dragged the icon by mistake.
Now choose “Input Devices” then “Mouse”. Now all you have to do is to change the setting from Single Click to Double Click.