Hi!
I have made some custom configs on XFCE (Zorin 17 Lite) to close options for end users in enterprise levels.
They can't install anything, and can't edit menus/confs etc...
But, tried to find file that point the "Zorin Appearance" in MENU and can't find it...
Someone can help?
Elevate to Root:
sudo -i
Launch File manager:
thunar
Hit the Up Arrow icon on the toolbar twice and then navigate to /usr/share/applications and remove the Zorin Appearance .desktop file from this directory.
Because the Zorin Menu is a plugin, you can directly edit its code to remove the line that displays "Zorin Appearance." I’ve done this before with the Zorin Menu (Core), but since I haven’t used XFCE, I’m not sure how it works there.
Isn't it possible to remove this in the Menu Settings of the xfce Startmenu?
I don't want to uninstall this pkg, but only remove visual entry for the start menu.
Removing .desktop file doesn't work, icon remains on start menu.
Doesn't work with Zorin Menu Lite.
The plugins for XFCE and GNOME are different, and this distinction should be taken into account.
Maybe this is hardcoded into /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libzorinmenulite.so
Can't manipulate. 
I just tested this via NoDisplay=true and it showed no changes.
I am beginning to suspect that @brunok is correct that this is hard coded in.
I will look into this further, but so far my attempts to hide that entry have failed.
I did a Brave A.I. search engine (not using the Brave Browser) and it stipulates the only way is to remove Zorin Appearance.
"Remove Zorin Appearance from Menu
To remove Zorin Appearance from the menu in Zorin Lite, you can uninstall the Zorin Appearance package using the terminal. Open a terminal and run the following command:
sudo apt-get remove zorin-appearance
This will remove the Zorin Appearance tool from your system, which will also remove it from the menu.
If you want to keep other Zorin-specific packages but remove just the Zorin Appearance tool, the above command is sufficient. If you encounter any issues or need to reinstall the tool later, you can do so by running:
sudo apt-get install zorin-appearance
This method ensures that Zorin Appearance is completely removed from the system, including from the menu."
I downloaded Zorin 17.2 Lite and installed it as a VM using virt-manager in Zorin 17 Core. This leaves a greyed-out 'Zorin Appearance' in the menu but does not affect the menu that is the default with Zorin Lite. Initially you could click on the greyed out icon and label which launched an error message. I delved into the system and searched for Zorin Appearance - there is one folder left, 'Zorin_Appearance'. I had to cd .. to get down to _ pycache _ then rm . the contents before going back up one directory to rm those which means no more error message if any attempt to click on the greyed-out Zorin Appearance. I tried removing with Menu Libre - even installed Alacarte - ironically it listed Zorin Appearance but it was not checked which means it should not have appeared in the Menu but having said that Main Menu ('Alacarte') is a Gnome Menu Editor.
sudo rmdir "/usr/lib/python3/dist-packages/zorin_appearance"
would not work so ...
cd .. (takes you to /home)
then
cd .. (takes you to the root of the system)
then
cd usr
then
cd lib
then
cd python3
then
cd dist-packages
then
cd zorin_appearance
then
cd Layouts
then
cd _ pycache _
then
sudo rm . (this removes the 3 files in _ pycache _
then cd back up then
sudo rmdir _ pycache _
then cd back up then
sudo rmdir Layouts
then cd backup then
sudo rmdir zorin_appearance
(Footnote: I did find that Zorin-Appearance.desktop was owned by root, I used chmod to take ownership, deleted it but it was still in the Menu!)
I just edited my post above.
I ran a test in terminal to remove zorin-appearance on Lite and it output:
The following packages will be REMOVED:
zorin-appearance zorin-appearance-layouts-support zorin-appearance-layouts-xfce-core
zorin-os-lite-desktop
It wants to remove the whole desktop.
My method did not do that. Out of curiosity I tried to theme like Windows 10 with not much success. So, I installed KDE, kept lightdm and here are the htop images, first of xfce:
then KDE Plasma:
And finally Plasma Desktop modified to take Zorin logo for the Menu button:
So xfce uses 53 Mb, Plasma 1 Gb. VM created was a dual processor with 4 Gb RAM and 25 Gb of Storage. Added Tiled Menu in Plasma to give it that Win 10 feel.
Ok, to get rid of 'Software', open a terminal and enter:
sudo apt-get purge gnome-software
To get rid of 'Settings':
sudo apt-get purge xfce4-settings
Now, whilst it removes them, it does not remove them from the menu, but if they are clicked on they get error messages:
Software error message:
Settings error message:
However, removing Settings prevents you from shutting down!
And a force restart reveals that xfce has departed completely, leaving only Plasma!
Yes, these are direct links to the application in the menu, apparently.
Is it a viable option to replace the Zorinmenulite with WhiskerMenu?
I've been trying to do that without success - as you know I am more of an infrequent Core user than a frequent Lite user!
I meant for the O.P., if that is an option. 
It would be the best solution if Settings needs to be hidden:
With Windows 10 icon for Menu to replace the mouse face:
If You should be open for using Zorin Core, I can give a Solution for these Entries. And Zorin Core, You use instead of the Zorin Start Menu the Gnome Extention ArcMenu. It is highly customizable and You can there remove these Entries in the Settings of the Extension.
In Zorin lite you can use "Whisker menu" which also is more customizable instead of the Zorin menu. You can install it with "sudo apt install xfce4-whiskermenu-plugin".
Then right-click on the panel>add new items>whisker-menu-plugin
