Thank you for your reply.
Yes, my downloads go into DC Downloads on drive D, and my shared folder and all its subfolders is on drive M.
You mean to disable partial sharing, i.e. sharing of files that are not yet completed? As it stands, it functions much like BitTorrent, am I right? That I might be able to live it, but how I would like to not share files that are downloaded and finished, restart on client or not.