I seem to have inadvertently swapped out my plasma Kubuntu desktop for what seems to be a Debian one. (It now has a green screen with a scroll shape in the middle.)KDE I also seem to have lost my taskbar too. How can I restore my original desktop for kubuntu 18.04
I noticed that there was a small gear icon on the Debian startup page and when I clicked this, there was an option to boot with several different desktops.
I clicked on the plasma one, continued the boot process and everything is good again.