(Make sure to restart Blender after removing the previous version)
Generative Modeling Toolkit for Blender 2.8
BY-GEN contains a collection of tools for creating generative content inside of Blender. This addon includes techniques for non-destructive generative modeling, as well as structured generators that allow you to build modular structures from pre-made parts, powered by Blender's collection system.
Please read the wiki for more information: https://curtisholt.wiki
Install from the zip provided. If the add-on does not immediately appear in the add-on list, then you can manually move the files into the correct directory.
See here for assistance with troubleshooting installation issues.