Learning to use the Addon in 2.91 blender

Continuing the discussion from Solar System Simulator:

Hi Markus I’m trying to follow the instrucitons but I’m rusty with bender and Cannot find the Object Category in the instructions.

Ubuntu 20.04.1 Blender 2.91 Optiplex i3-4150 (2015).

Before using this file you have to

  1. dowload and install the addon, (??? i cant find the add on when I install it; after installing it its not part of the list of addons)
  2. activate it (it’s in the object category), (??? where do i find it).
  3. in the 3DView, go to the right sidebar, Tool-category,
  4. click the button “Update Drivers”.