This method might be better

Code:
$nk2=ReadValue('HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders', 'AppData')
If Exist($nk2+'\Microsoft\Outlook\*.nk2')=1 ;Searches for files ending with .NK2 and deletes them.
  Del($nk2+'\Microsoft\Outlook\*.nk2')
EndIf