Yesterday I have powered off my main daily-driver laptop running Ubuntu MATE 16.04.6 LTS.
I'm not sure, may be some SFTP file-share was not clearly unmounted...
Then today I switched laptop on and see black desktop with many Caja icons in Window List on MATE Panel after boot:
The Caja itself does not want to open. Running
killall caja does not help either.
What else should I try? Why this happen?