Just curious how most techs perform upgrades....One of our tech just returned from Mitel class and said he was told when doing an upgrade to perform a Full Install via the MCD Installer tool then do a database restore...instructor said doing a full install instead of selecting "Upgrade" via MCD Installer tool cleans out the old MCD software much better....I thought doing "Upgrade" did the same thing as Full Install except upgrade performs a backup and restore in one motion along with upgrade.