i have installed pro. version now mac like lauchpad is inactive, i think installed gnome is not pro version. how it can back ?
Can you please try:
sudo apt install zorin-os-desktop-premium
it says unable to locate package
Perhaps it is
sudo apt install zorin-os-premium-desktop
If neither of the above work, you may need to insert your Zorin OS Pro installation medium and enable it as a source.
Note for non-Pro users:
The above commands will only work on installations of Zorin OS Pro. It will not work on Core or Lite (Or versions of Education), nor can it enable a user to "upgrade" from Core to Pro.
how to enable it? I have premium disk. I am sorry i am new to linux
Open your app menu and search for and launch Software & Updates
application.
Or you can tap ctrl+F2
and enter in software-properties-gtk
Insert your Zorin OS Pro installation medium.
In the Software & Updates app, navigate to the Other Software
tab.
Check the box for cdrom:[Zorin-OS...
to on.
Your installation medium is now available to use as a package installation source.
When youa re finished, please remember to uncheck the box for cdrom:[Zorin-OS...
and remove the installation medium.
Software upgrades that may have come down after you installed the OS could cause conflict with any older packages in the installation media if you forget and leave that enabled.
how to remove gnome and reinstall as pro from installation media?
i have bootable usb drive not cd
cant found
cdrom
is just a name from days gone by... it will use the USB installation media.
ummm... It should be present - it is default installed on Zorin OS.
Was it removed somehow?
In app menu, search software
by typing it into the open app menu. See if Software & Updates
app is offered in the list.
error, cd-rom doesnt have a release file
As this is a Zorin OS Pro Issue, perhaps you may be better served by using the contact form provided in your purchase of Pro to contact the ZorinGroup directly for assistance.
i have uninstalled nvidia driver but still mouse keyboard not working. work another account.

but still mouse keyboard not working. work another account.
Try:
mv ~/.config ~/.config-bk
log out and in, test.
not working
You also may consider reinstalling Zorin OS...
Thanks alot, i need recover, should i use "sudo apt install -y gnome gnome-shell zorin-os-desktop-premium" ?

Thanks alot, i need recover, should i use "sudo apt install -y gnome gnome-shell zorin-os-desktop-premium" ?
Currently, you have said that is not working.
how to full backup and restore?