Hi bobdoyle,
It seems that you missing some files in Downloader, I need ask some questions to figure out this issue.
1. Do you upgrade to iClone 6.5? This pack is for 6.5 version.
2. You only have issue on this pack or also have same issue in other iClone 6.0 pack?
If you need more help, please send support ticket to us, our support team will help you.