I worked out how to do it.

Simply do a search for the file that you started downloading and when it comes up, download it the way that you would with any new file.

Limewire will automatically check the incomplete directory and realise that you already have some of the file so it will start from the point you got to.

You won't have to re-download any of the file.

The problem with this is that you have to be able to find the file by searching for it.

If the person who has that file is not logged on and it's rare you might have problems.

It would be nice if you could get the file back in the download list with something simple like a right click option.