To determine which Upgrades apply to you, first check what you currently have, then decide what you want using the list below:ġ. Only registered users who have purchased a genuine Ross-Tech interface either directly from Ross-Tech or from one of our authorized distributors/resellers, or who have purchased a license for VCDS-Lite or an older version of VAG-COM are eligible for these programs. New customers or users who are not registered with us do not qualify for any of these programs. For registered VCDS (VAG-COM) users in good standing, we have upgrade programs which allow you to purchase one of our current products at a substantial discount.