tera4dThe following plugins are no longer available As of July 1st, 2015, the following plugins are no longer available from Tetra4D ®:. Enrichment Plugins include: 3D PDF Animate, 3D2 of 10. Step 1. After the installation of Tetra4D Converter, start Acrobat. Step 2. Click on Tools in the main Acrobat toolbar to access to the Acrobat features and to the installed Add -ons