Psyclone

I have already downloaded the file, i'm now looking to seed the torrent for others but it can't find it as BT is looking for it on a now-defunct drive E when it is actually located on my hard drive designated D:

How would you go about changing where it looks for the torrent? I have 5 files that i need to continue seeding for a while but had to remap my hard drive as D: instead of E; and now it keeps saying Error; cant open file, etc as I know longer have a drive as E...I know i can change the locations of torrents and completed files and downloads in the preferences tab but i also know it doesn't retroactively update all torrents when i change those. I still have the file and the original torrent even but can't figure out how to continue seeding it...