First, download the installation file for your operating system. You don't need to delete previous versions of SketchUp before installing either a new SketchUp or an update of an already-installed version of SketchUp.
With SketchUp Subscriptions, your authorization is tied to your Trimble ID. To authorize SketchUp you’ll install the latest version then on first run you’ll be prompted to sign in. Once you’ve signed in, SketchUp will sync with our subscription servers and activate the software.
New SketchUp Pro 2020 Users - Start Here Downloading SketchUp - Here you can download the latest version of SketchUp and get instructions on the installation process. Installing SketchUp Pro - If you're uncertain of the installation process for SketchUp you can get some step-by-step help here. Opening and Activating SketchUp Pro - Once you've installed SketchUp you might have some questions about getting authorized.