You don't need a program, you just need to download the replays you wanna watch.
Example:
1. Download some replays
2. Highlight them, copy them
3. Go to your Toribash 3.9 directory and enter a folder called "replays".
4. paste the replays you wanna watch
5. Open Toribash > Setup > replays
6. Find the replay you wanna watch and....well...watch it : )