The Lego Digital Designer CAD software was developed and published by The LEGO Group from 2004-2016.
The Lego Digital Designer cadsoftware is developed a The Lego Group from 2004-2016.
The software is free and can be downloaded from www.ldd.lego.com
TLG have discontiuned updates regarding functionality, the adding of new LEGO elements or glitch fixes.