I had asked this question before re: previous SkUp versions. But the old tricks don’t seem to work anymore. How do I transfer my materials/textures from SkUp '20 to SkUp '21 Pro. And how do I delete the terrible textures that come with the software program?
What I did was to use from Finder: Go Menu → Library → Application Support → SketchUp 2020 → SketchUp → Material and then copy the content of the Material directory.
Then navigate using the same procedure but this time use SketchUp 2021 and then paste in the Materials directory.