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We just launched SketchUp Pro 2021! If you are reaching out to recover your license details, please check our License Wizard. If you have a SketchUp Pro subscription, you don't need a license! you can just sign in with your Trimble ID. You can download SketchUp Pro 2021 here. We have an installation video for SketchUp Pro 2021 here.
With SketchUp’s Solid tools, you can create new shapes by combining or cutting one shape with another, making it easy to model an outer shell or joinery.