They are trying to recover a legacy workspace that newer versions (like MatrixGold) may handle differently. How to Install RhinoGold 5.7 from a ZIP File
If the RhinoGold interface doesn't appear in Rhino, type RhinoGold into the Rhino command line to force-load the plugin. rhinogold5706zip install
Searching for specific ZIP installers like "5706" often leads to "crack" sites. Downloading rhinogold5706.zip from unverified third-party sources carries significant risks: They are trying to recover a legacy workspace