Hello!What version are we talking about please? Was uninstaller complaining about something during the uninstall process? Have you uninstalled and trying to install the same version, or you have uninstalled older version and you are trying to install a newer version now?The main files are:[ArchicadPath]/Add-Ons/Corona*[ArchicadPath]/Corocad*[ArchicadPath]/Corona*[ArchicadPath]/Legion*