You're right, in most cases a web search is the first thing to try, however, after clicking on that link I got "Page Not Found" error.http://dannyda.com/2020/02/21/how-to-switch-desktop-environments-for-kali-linux-easily/ ?Code:
sudo apt install kali-linux-all
A simple search would have probably answered your question.
So you might try either one of those solutions.Q: I tried XFCE and I really like it but I still would like to switch back to GNOME. How can I do that?
A: You can run apt update && apt install kali-desktop-gnome in a terminal session. Next time you login you can choose “GNOME” in the session selector in the top right hand corner of the login screen.