I typed sudo apt remove easyscreencast
and I got the result:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package easyscreencast
So anyone can explain me how to remove and purge EasyScreenCast?
I found the application called Tweaks, I can turn it off. I followed the steps from the website.
Open the terminal and type the following:
And then, open Tweaks and turn if off.
Later I found how to remove it, go to there: https://extensions.gnome.org/local/ and then, click X. That's all.