that's an easy one provided azureus doesn't append any .ut or some other form of extension to the file. If there isn't & u can see the folder where the file or folder is . Close Az & open utorrent. Now if u also have the .torrent file then load the torrent file & give the location of the downloaded file as the place to download. utorrent will check how much of the data has been already downloaded & will download the rest.
I've done this quite a few times when due to electricity failure & my UPS not working some of the .torrent files were lost while the data was still there. By the above method I didn't have any issues till date
thanks all for sharing good information abt torrent downloader softs. presently i m using utorrent v1.2 and i will soon download latest version of utorrent.