Sketch Up 2018

Hey there,
I need to get Sketch Up 2018 running on my new computer. For various reasons and software I can’t run anything newer than OS 10.11. I have my authorization code since I was doing this on my other computer that is now out of commission but I need to know where I can find the Sketch Up pro 2018 download link. Thanks!

https://www.sketchup3d.de/download/center/#199-180-version-2018