Deana B

1. Completely close Limewire.
2. Create new folder, "A".
3. Copy all of your downloads, except the troublesome 'rogue' one, from the Incomplete folder to the new folder ("A").
4. Delete the Incomplete folder.
5. Rename the "A" folder, Incomplete.

You will have replaced your Incomplete folder containing the rogue file, with another folder of the same name but not containing the rogue file.