Scoreboard

Hi, can anyone tell me how to clear the scoreboard on Season Match.
I've got various high scores under several names but would like to clear the whole lot and start again.
I've tried un-installing and re installing but it still comes back with the scoreboard full Would be glad if anyone could help Thanks

A very helpful guy called Jared on the Big Fish Helpline in Seattle has given me instructions and its worked so if anyone else has the same problem do get in touch with me.