This is an optional, subscription-based plan for owners of SketchUp Pro classic (perpetual) licenses. This plan gives you access to not only updates and support, but most importantly, to upgrades. As soon as the latest version of SketchUp Pro is available, subscribers to the UMS plan receive an email containing new license information. They can now proceed to download, install, authorize, and use the latest version. UMS is available to both single-user and network classic licenses. The plan is automatically added and billed to your first time purchase. This means that for the first year of your classic license purchase, you are automatically subscribed to the plan. After this, you can either renew your subscription to the upgrade, maintenance, and support plan or cancel it. It is important to note that this plan is an independent and optional subscription for classic licenses only.