Why is there no YEAR by the date of these comments? I have no idea what year these were posted and things could have changed with Sketchup. I can not download it, this is 2018. It keeps directing me to use it within my browser instead which does not give you all the tools I see on the downloaded versions. What is going on?
There is SketchUp Free for using on your browser but you can download SketchUp Make 2017 if you want to use that instead. Of course both are for non-commercial use. Otherwise you should be using SketchUp 2018 Pro.