The trial version provides full access to Premium features but includes watermarks on images and limits terrain mesh imports to 500 points. Once you are ready to upgrade, you can apply an activation key to convert the trial into a permanent or subscription-based license. CAD-Earth – Connect AutoCAD with Google Earth
If budget is the issue, consider these safe options instead of searching for an illegal copy: CAD-Earth v8.1.5 for AutoCAD Free Download - In...
CAD-Earth is a plug-in for AutoCAD that enables import/export of geographic and terrain data between AutoCAD and mapping/GIS platforms (Google Earth, ArcGIS, other spatial formats). Version 8.1.5 is a maintenance release focused on compatibility, stability, and minor feature refinements. The trial version provides full access to Premium