Hi, im looking at the Pro license for managing a clinic's computers. I understand the way the upgrades work for that. But what about the endpoint licenses? do they also have to be upgraded at each new release? and if so, what if some of them are bought at the begining of the year, others and the middle, etc... how does this work for renewal? I cant imagine preventing some of the systems with the older licenses only use for example version 6, and the newer ones use version 7. Just need a bit of clarification before I proceed.