GL-AX1800 update and keep full configuration


I received a message that there was a update available for my AX-1800 router.
So I made a backup in Luci interface and installed the FW upgrade. v 4.5.0
After installing succesfully, the router rebooted and AGH was completely removed.

Today, I reinstalled the router with VPN client/server and AGH but isn’t it possible to restore the complete software which is installed before the upgrade?

Thank you very much,