License keys were used in the old Solibri Model Viewer application. Solibri Model Viewer is no longer available and has been replaced by Solibri Anywhere. In addition, our licensing system changed in 2019, so we are unable to generate license keys for Solibri Model Viewer. Therefore, you can no longer download it or acquire a free license key from us. Also, you can't update the Solibri Model Viewer, you need to install Solibri Anywhere instead.
We recommend that you register for Solibri Anywhere by following the instructions in this article.