Sorry to hear you are having problems downloading.
Unfortunately it seems like you must have quite a slow download speed and possibly some connectivity issues.
The Dark Heroes download process should be no more than 10 - 15 minutes for each pack with a reasonably fast download speed. To avoid content failures due to connectivity issues, try using a wired connection if possible and not a wireless connection. This might improve the stability and download speed.
Peter
Forum Administrator
www.reallusion.com