Note that after applying the update, it will appear in Add or Remove Programs as "Update" under "Autodesk DirectConnect 2010". Note: you need to click the "Show updates" button at the top of Add or Remove Programs to see updates.

This relates to JT translators for Alias Surface, Alias Design, Showcase and Opticore Studio products 
"if you notice some loss of data or placement issue with JT assembly components or unexpected material or texture assignments, you should install this hotfix".