SketchUp's default extension installation path is...
C;\Users\SomeName\AppData\Roaming\SketchUp\SketchUp 2022\SketchUp\PluginsOur ExtensionStore detects when there is additional extension locations as some third party apps, like render engines, will install extensions in other locations...
https://i.imgur.com/WA2FT1p.png
Always pick the top path to ensure correct installation unless you know for sure any additional path are needed.
You screenshot of your Extension Manager dialog is showing that RoundCorner, Visuhole etc are not installed in the expected location.