@Aravisian, Cinnamon came with Nemo. I want to use Nemo as default in Zorin OS (when i am not using cinnamon). How can i use Nemo as default ? because when i create a new folder nautilus is taking over.
Is this still working ? When i hit in terminal "startup applications" it's not there
This guide will serve your needs:
I also always keep Nemo as default.
Nemo came with the cinnamon installation i did a few days ago.
When logged into your Cinnamon Desktop, then Nemo should already be default.
If you want to set Nemo as default for when logged into Gnome (Zorin Desktop), then the above guide should work perfectly.
Great! so i followed this part
xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search
gsettings set org.gnome.desktop.background show-desktop-icons false
gsettings set org.nemo.desktop show-desktop-icons true
it works, if i want to refert back what do i need to do next ?
The reverse is true. To revert:
xdg-mime default gnome.desktop inode/directory application/x-gnome-saved-search
gsettings set org.gnome.desktop.background show-desktop-icons true
gsettings set org.nemo.desktop show-desktop-icons false
Just as i thought...thanks again, 1 more question. I also used this command nemo-desktop& and it throws errors here. Is this needed and what does it do ?
** (nemo-desktop:12923): WARNING **: 14:04:32.714: The theme appears to have no nemo support. Adding some...
** (nemo-desktop:12923): WARNING **: 14:04:32.715: Desktop already managed by another application, skipping desktop setup.
To change this, modify org.nemo.desktop 'ignored-desktop-handlers'.
These are normal.
This one merely means that certain classes are not directly assigned in the the theme css. Fortunately, Nemo (and Nemo is unusual in this), will use its own Nautilus code to grab the properties outlined in the css file anyway.
You can manually change desktop handlers using dconf-editor:
sudo apt install dconf-editor
Then navigate the path it shows - /org/nemo/desktop/ignored-desktop-handlers and set the settings as you wish.
The reason for the 'error' is that Gnome-Shell is installed and running.
It's handling things, though, and is not a big deal. Again, this just falls to user preference, especially if you use Desktop Icons (I don't. I like my desktop completely clean and uncluttered, myself).
Ah oke, so i don't need to install dconf-editor to change that ?
Thanks again.
Dconf-editor is a worthwhile tool to have on hand when you need it. But no, you do not need to.
Oke and the last step was gnome-tweak-tool, i remember i used that tool in my first zorin installation and for some reason i removed it with a sudo command. The problem with that command, it deleted alot. My zorin installation was completely trash. Now i am not sure if it was duo that command or a failed nvidia installation back then....but pffff i don't want to touch that again haha
You only need gnome-tweaks for Gnome Desktop. If you are using Cinnamon, gnome-tweaks would not even launch on it, I think.
Removing gnome-tweaks should not damage the desktop in anyway though.
A failed Nvidia installation is the far more likely culprit.
@Aravisian: Not this by the way ? ubuntu write this
Go back to using Nautilus instead of Nemo:
xdg-mime default nautilus.desktop inode/directory application/x-gnome-saved-search
gsettings set org.gnome.desktop.background show-desktop-icons true
sudo apt purge nemo nemo*
sudo apt autoremoveAnd remove the nemo-desktop command from your startup applications
What is the command to delete nemo-dekstop, they dont write that haha
Yes, THAT.
Sorry.
And remove the nemo-desktop command from your startup applications
how to do that ?
The easy was is to open your file manager, go to ~/.config (hit ctrl+h to reveal it if you do not see it) and then autostart folder and delete the entry.
In Cinnamon Desktop, you can open the App menu and go to Startup Applications and remove it from the list there.
Thanks for your time and the walkthrough...keep learning everyday 
I think it's not installed haha
It's not installed in ~directory, then. In which case, please use the Startup Applications dialog.
Found it! it's not listed
Probably a category thing in the menu- but yes, typing the app name into the menu will pull it up.