If you previously purchased a Classic license, you can look up your existing serial number via the SketchUp License Manager Subscription: You can purchase a legitimate SketchUp Pro subscription
A more affordable subscription for those who primarily work on iPad or the web. sketchup pro 2020 classic license key upd
The primary fear with the new model is that if you stop paying, you lose access to your own creative history. If you previously purchased a Classic license, you