3.1.3 Update

Released March 27, 2012

• Added support for AutoCAD 2013.
• Restored support for AutoCAD 2004, 2005, and 2006.
• Fixed IFC export to set units correctly to handle scaling errors in other programs.
• Fixed an error with the IFC export that would leave extra entities on the drawing when it was finished.
• Fixed bug that caused pipe labels to move on the isometric when it was refreshed.