New - sudden problems in OS X

I've been using ElectricSheep on my Macbook Pro for about a week now, and it's all been working perfectly. I've set the cache to 10gb, and I'm downloading torrents from the RSS feed through Vuze, then moving them to User//Library/Application Support/ElectricSheep. All those sheep have played fine. But today when ES started up, it just started playing the same sheep over and over - appaarently, 'sheep no. 0'. All the files are still there; checked. The only thing I think I've changed is download VLC and set it as the default for mpg files.

I helped my brother install ES on his Windows laptop, too. I kickstarted the flock with a 180mb sheep pack, and placed it in what I think is the right Windows ES directory. However, he's having the same problem. From since it was installed, ES only plays one (or occasionally two) sheep. Don't know what they're called, thouh, since I don't know how to pull up the status on Windows ('S' on Mac).

Help?