How to Install the Datasmith Exporter Plugin for Archicad START or a second instance of Archicad - For Windows OS
https://dev.epicgames.com/community/learning/knowledge-base/2JYM/twinmotion-how-to-install-the-datasmith-exporter-plugin-for-archicad-start-or-a-second-instance-of-archicad-for-windows-os