LEAP 42.1 Single or double clicking - KDialog

I have changed mouse settings in order to open folders and files via double-click in KDE. Normally all dialogs and file managers respects this settings except for KDialog, in which single-click works only. Don’t you have any idea how to fix that? This post does not work for me. I use Leap 42.1 with Plasma5.

Hi,
Exactly the same problem… This 367074 – mouse single/double-click preferences not propagated to kde4 applications doesn’t help

Well, that fix is in 5.7.4, but 42.1 only has 5.5.5.
It should help to edit ~/.kde4/share/config/kdeglobals manually and change SingleClick=true to SingleClick=false.

Or install and use KDE4’s systemsettings (package kdebase4-workspace-addons) to change it.

Fixed! Thanks a lot.
It appears KDialog has other problems as well. I can hardly work with it in Google Chrome, because it is extremely slow.