Txs Umberto- do I get you right when using the Universal Installer from now on?
The Universal Installer IS the new version of the Live Update. It's even named the same way, just that it can run ALSO as an installer, when started from the "FSDT Installer" icon, or as an updater, as before, when run with the "FSDT Installer".
If, instead, you asked if you should always use the "FSDT Universal Installer" INSTALLER, that's only required in case the Live Update doesn't work at the first try in updating itself as it should.