Desktop Client: How do I Edit and Write to iGrafx ".igx" files?

In order to edit iGrafx '.igx' format files, you need to purchase an appropriate version of the iGrafx authoring tool. If you simply want to view iGrafx '.igx' files created by someone else, iGrafx offers a free Viewer application on the iGrafx website. Please see the iGrafx website (http://www.igrafx.com) for more information.