Kde Plasma5 copy/paste not working

In System tray - entries - system service in plasma, I disabled clipboard. There was no klipper option to start that process. After that, there still was no paste working.

I did create a new user and copy/paste did work as new user. I am very reluctant to tamper with all that i have in /home to move all old stuff to a new user. I have backups but still nervous.
What would you recommend as a next step? What could cause my current user to ignore copy/paste in plasma but not in mate?

Also, as additional info, I tried copy/paste in gnome and that also did not work. Copy/paste only works in mate and works in plasma as an alternate user.

thanks for your suggestions. Have a next step in plasma?

tom kosvic