If you are like me, and like the Nemo file manager over the built in Nautilus file manager, here is a guide how to make Nemo the default file manager on your Zorin OS.
This will also work if you use the OS shortcuts
Super + E
All the commands need to be executed in the terminal.
Install Nemo (if it's not already installed):
sudo apt install nemo
Make it the default file manager:
xdg-mime default nemo.desktop inode/directory application/x-gnome-saved-search
This step is optional. If you are switching to Nemo, may I suggest you also use the Nemo file roller:
sudo apt install nemo-fileroller
Reverse the changes, in case you want back to Nautilus as the default file manager:
xdg-mime default nautilus.desktop inode/directory application/x-gnome-saved-search
To remove Nemo and Nemo file roller, run the following command:
sudo apt remove nemo nemo-*