Problems with 2020 new install

[colin]

It’s the second of the two 2019 entries:

Setting SketchUp 2020 as the default application in Windows

There is a known problem, which will be fixed in the next update to the installer, where the Open With menu shows two entries for SketchUp 2019. The second of those is really SketchUp 2020. Same thing if you are in Properties setting the default application for SKP files.