http://support.allume.com/techsuppor...pic.php?t=1751 http://support.allume.com/techsuppor...opic.php?t=313 http://support.allume.com/techsuppor...p?id=517&prod= The top of the 3rd link page will show that it's a stuffit engine error. I guess that suggests a dwnlding error, either during the dwnlding process or corrupted at the source. Alternatively, the file hasn't completed dwnlding. Or you're running off a network & don't have permissions for carrying out the operation. These are my suggestions anyway.