As suggested by Sebastien Bacher, I tried in the terminal:
cd /usr/share/applications/kde
for x in $(grep -xl "^Path=" *.desktop) ; do sudo sed -i 's/^Path=/#Path=/' $x ; done
Then I logged out and back in, and the bug was gone.
Thanks Sebastien.
As suggested by Sebastien Bacher, I tried in the terminal:
cd /usr/share/ applications/ kde
for x in $(grep -xl "^Path=" *.desktop) ; do sudo sed -i
's/^Path=/#Path=/' $x ; done
Then I logged out and back in, and the bug was gone.
Thanks Sebastien.