I had the same problems when I was a newbie. In my case when I would click on the torrent it wouldn't start up the bittornado client so here's what I did to fix it.
1. Find the bittornado executable its called btdownloadgui.exe
2. Creat a shortcut to the executable on your desktop
3. Find the .torrent file that you want to download, i.e filename.torrent.
4. If left clicking doesn't bring up the save as dialog box
try right clicking and choose save as.
5. once u have saved the .torrent file drag it onto the shortcut
that you created on your desktop.
6. That will bring up the Browse for Folder dialog box
asking you where u want to save it.
7. click ok and you will be on your way.
Hope this help