.
Actually, you guys can use this to your advantage.
You have the torrent fully downloaded. Your account here at MWP does NOT have download credit against you.
So, what you do is take the completed torrent out of your download folder and remove it from your client. Then come back here to MWP, MAKE SURE you are logged in this time ...

Now, go to the torrent you already have & download that torrent file (again). It will contain a unique hash key tied to your member name (thus, protect it so someone else doesn't blow your ratio by downloading as you!).
On your computer, your bit torrent client doesn't know you have the completed torrent anymore ... so move the completed torrent back into the bit torrent DL folder (making sure not to edit anything!).
Now when you add in your personalized torrent file ... the one you've downloaded while logged in ... your client should find the completed torrent in its folders, figure out you already have 100% of the torrent and go straight to seeding.
While you have 'lost' your credit up until now as a guest, you will now gain pure credit without having to overcome your download.
Thus, you will be beginning life here with pretty impressive share ratios, until you download more torrents.
Now that I have instructed you in the ways of 'hacking' your share ratio here, I would ask you not to abuse your newfound powers by going over to the Dark Side.

Welcome & enjoy!
-- t3h 3Xp4t