Navisworks Doesn’t Start or Launch

We’ve had a few instances of folks contacting support over the past few weeks saying that when they go to launch Navisworks (Review, Simulate or Manage), nothing happens.  No splash screen, nothing.
It has seemed to fall into one of two issues…

1. Lastsession.xml
2. Corrupt CascadeInfo.cas

For the Lastsession.xml, follow these steps…

• Close Navisworks
• Locate Lastsession.xml
• (XP default location) C:\Documents and Settings\**username**\Application Data\Autodesk Navisworks **product** 2010
• (Vista default location) C:\Users\**username**\AppData\Roaming\Autodesk Navisworks **product** 2010
• Delete the LastSession.xml
• Try and open Navisworks

For the corrupt CascaseInfo.cas, see this link…
http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=13894457&linkID=9241177
From what I’ve seen/heard, either one of these will usually fix Navisworks from not starting.