Because Trimble no longer sells Terramodel licenses, and the official support pages have been removed. A legitimate user with a valid dongle might still need the installer. However, Trimble’s official position is: Upgrade to Trimble Business Center.

Subject: Trimble TerraModel 10.4 and MediaFire AutoAtlas - Your Competitive Advantage

: Combines COGO (Coordinate Geometry) calculations, automated drafting, and roadway design in a single package. 3D Visualization