Ubuntu – How to enable File Manager to handle desktop after removing GNOME 3

I am student from Indonesia.

I've installed GNOME 3 from latest PPA and used instructions written by user Jon :

How do I install and use the latest version of GNOME?

And after that, I removed GNOME 3 and used instructions from above question too. But in GNOME 3, right-click can't do in Desktop (File Manager does not handle desktop) and it's also exists to my old Unity desktop 🙁

How I can fix it?
Thanks so much.

Hmm, still not working 🙁
Thanks for the answer 😀

By default in GNOME 3, File Manager does not handle the Desktop, but I using Gnome-Tweak-Tool for fix it… But before I removed GNOME 3, I return the initial setting 'File Manager does not Handle Desktop'
And the setting was also influential in Unity 🙁

Any others??