In order to start building your own models in LEGO Digital Designer, it is essential to install the correct version of the software. The latest working version is 4.3.11, not 4.3.12. While version 4.3.12 is the latest release from The LEGO Group en therefore newer, it introduces compatibility issues and removes access to important online and offline brick libraries.

By installing version 4.3.11, you can enjoy the full experience that LEGO Digital Designer was originally intended to offer — including a rich library of over 6,500 unique parts. With this complete collection available, you can freely explore your creativity, rebuild official LEGO sets, or design entirely new creations with an authentic digital building experience.

Please download the updated LDD 4.3.11 installer from GitHub and follow the instructions below.