Relocating Torrent Files and Downloads

The tracker saved in the torrent file has stopped accepting connections for that torrent.

You need to (somehow) find another tracker, and set that in utorrent.

If utorrent does not allow you to do this (I think it does), you can edit the torrent file with a torrent editor or any editor that reads BEncoding. You can find such an application and further information in this utorrent forum post.

Run µTorrent in portable mode:

How can I make µTorrent run self-contained in one directory?

Simply copy the entire contents of %AppData%\uTorrent into the same folder as utorrent.exe. Alternatively, create a blank file named settings.dat in the same folder as utorrent.exe

You can copy the settings to C:\Program Files\uTorrent, just make sure to give users "Modify" permission on the directory.