This extension was part of Blender 4.1 bundled add-ons. It is now offered as it is, with limited supported.
No changelog for this release.
This extension does not require special permissions.
There is A problem with the (0.2.0) version that I have installed. Please fix it.
Works pretty well for creating quick landscape setups with the presets that existed up till 1.9, 2.0, but that should be fixed soon I hope.