The current on uncompleted downloads shouldn't just be named JOB-Segment5-15.xlx, they should have the original name in the begginning and the extra info at the end so someone would know which file is which if a download fails and wants to view what amount was downloaded like an mp3 of video. I am not sure but the xlx shouldn't be a propriatery format, if is it right now, so someone can just rename the file and open it as an truncated mp3 or other file it the viewer program will support that.