Forget all of that.
Use the context-menu to “Run as administrator”
This will do everything that is needed.
The guidance you quote is confusing, if not ‘pants’.
It should have been corrected long ago.
Too many at Trimble/SketchUp are blinkered MAC users, and thereby they fail to understand the [simple] basis of PC installations, and regurgitate this out of date advice…
Do NOT double-click the installer file - use right-click and “Run as administrator”…
It is NOT the same as double-clicking when you have admin powers.
It is NOT the same as you being the administrator and double-clicking.
It is not just applicable to SketchUp - it applies to any complex app you might install on your PC !
If you don’t believe me try these other sages etc…
There are dozens of similar posts if you do a search…