Navigate to the official or your CAD's extension warehouse (e.g., SketchUp Extension Warehouse). Download the latest version of the LiveSync plugin.
Find in the list and select Modify or Uninstall/Change . Navigate to the official or your CAD's extension
Check your to ensure that both Lumion and your CAD software have "Inbound and Outbound" rules allowed. Navigate to the official or your CAD's extension