How to make a "fresh" start with IDE 2.2.1

Which directories should I delete so that the next launch of the IDE is a "fresh" start?

I have identified these directories on Linux:
~/.arduino15
~/.arduinoIDE
~/.config/arduino-ide
~/.config/'Arduino IDE'

Background:
I managed to accidentally drag the debug icon from the sidebar and did not manage to get it back. I deleted the mentioned directories in the hope that it would be the equivalent of starting the IDE for the first time, but that was not the case.

Kind regards!

Have you tried to reset the workbench? That usually restores the default icons.

I have tried to restart it. Is there a "reset" function that I don't know about?

That resets the workbench and should restore the sidebar icons to default.

Thanks!

Glad I could be of help.