Hi,
we have the successfull downloaded files marked green and the currently downloading file marked red in searches list.
I have often the Prob, something I'm donwloading disappears, and there are no longer any sources. I abort the download, and chosse a different file. If this is done 2 or 3 times, I can't remember all files that don't work. Many files have only a different hash, but the same name, and it is possible, that you start a file you aborted some days ago.
I would suggest grey for those files.