what program do i use to open replays

You use toribash, and this should be in support.

To be more specific, find where ever you put your toribash folder (default your C:/Games) and drag the replay into the replays folder, open toribash and hit escape then click setup, and replays.

Yes, this should be in Support or Beginner Sanctuary but since problem seems to be solved I'll just close and forget this.