iGridd is the application, modified Mar.22, 2011, whose icon is 3X3 squares of red, orange, yellow, green, blue and white. I'm not sure where I found your site's invite to download this. It is 120KB. Clicking "About iGridd" gives no info, not even a version.
The reason I went and searched for it, or read about in the forum, was that the menu choice iGridd / open iGridd Applet caused anguish because if I left it opened with a saved puzzle and put my iMac to sleep, the next time I woke up, after 6 seconds or so, entire Safari would quit. The iGridd app does not do this.
BB