More info here
Freeze transformations script. Set rotation to (0,0,0), set translation to (0,0,0) and set scale to (1,1,1) and set shear to (0,0,0) without changing the appearance of the object.
This script comes pre-installed in the Unofficial trueSpace Updates - https://www.united3dartists.com/forum/viewforum.php?f=55
July 3 2015 shear works with multiple selections
November 30, 2012 unique button id
June 11 2012 - Automatic installer, new icon and new freeze shear option
Dec 16 2009: Fixed tool tip
Sept 22, 2012 - Radius of unselected spot light controls size of the Indigo ies square mesh