NOTE: If the downloaded ZIP file fails to unzip or gives an error, please first make sure it downloaded fully (or re-download it). If you are confident that it downloaded fully, then try to unzip it using 7-ZIP (//www.7-zip.org). If you are using a work-issued laptop, it may be locked down and if so, please contact your IT support for help. Topologic for Grasshopper is also available at Food4Rhino. If all else fails, please contact us at info@topologic.app and we will send you the software.