1) UNINSTALL BY PROGRAM IN START MENU,
above Autodesk : name uninstall tool
2) DELETE LICENCING FILE
On Vista or Windows 7: C:\ProgramData\FLEXnet\adskflex_########_tsf.data C:\ProgramData\FLEXnet\adskflex_########_tsf.data.backup On Windows XP: C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_########_tsf.data C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_########_tsf.data.backup
3) DELETE OTHER FILES IN :
C:\Program Files\Autodesk\ C:\ProgramData\Autodesk\ C:\Program Files (x86)\Autodesk\ C:\Users\All Users\Autodesk\ C:\Users\**YOUR USERID**\AppData\Roaming\Autodesk\ C:\Users\**YOUR USERID**\AppData\Local\Autodesk\