He launched the application. The familiar axes appeared. He pulled up the rectangle tool and began to draw. The speed was intoxicating. The geometry flowed from his mouse like ink from a pen.
Many older plugins are still compatible with 2018. Use the Extension Warehouse to find tools like Fredo6 or Curviloft to enhance your modeling capabilities.
If you are a hobbyist looking for a free version, SketchUp Free (Web) is the official, safe, and modern way to use the software without a subscription. How to Optimize Your 2018 Workflow