Thanks for the reply, however if I'm grasping what you're saying, you're suggesting I identify all the corrupt files - delete only them, then re-download, skipping the correctly downloaded files which have been left in the folder?
If so that is almost akin to redownloading the whole fle again. I only have 14 complete files out of 293 - the rest have on average 2-3 parts missing. What I was hoping might be available was to redownload and add ONLY the missing parts, to the missing files ie (part001.rar - size 524,288,000; downloaded 522,752,000. Is there no way to merely download the missing bytes from the new providers download files - which are intact.
Or am I clutching at straws.