Click the (or "Install from disc") button at the top.
Official versions and documentation for this specific tool are typically found on marketplaces such as Superhive Market . For general Blender software (rather than the add-on), official portable .zip versions can be found on the Blender Download Page . Download File Multi Instance Blender v1.1.0.zip
: Useful for workflows that require copying elements like textures, light setups, or models from one project to another without closing the current file. Click the (or "Install from disc") button at the top