You mean you have copied the tar file into the "Update" Samba share?
OpenELEC will only notify you about OpenELEC updates, any notification will have nothing to do with anything copied into the "Update" folder.
If you're rebooting OpenELEC and it's not applying the LibreELEC upgrade tar copied into the "Update" folder then OpenELEC is either not finding anything to upgrade with (you've copied the LE tar into the wrong folder) or OpenELEC is showing you an error/failure during the upgrade which you are not mentioning.
The update file is copied to the correct folder, the reboot does not have any error messages because the update command not works.
Do not be mindful of the name of the network path is actually openelec
il file di aggiornamento è copiato nella cartella corretta, al reboot non ci sono messegai di errore perche il comando update non parte neanche..
Non fate caso al nome del percorso di rete in realtà è openelec