Bomberman file deletion?????

Does anyone know how to delete the 3 files on Bomberman as my son has just purchased it offhis friend but wants to start from the beginning and is totally bugging me to find out how............HELP!!!!!!!

Any help would be gratefully received, thanks in advance.

Man, when I played it, the same problem xD

I figure out the bin after a lot of thinking xD

Nice game by the way, especially in multiplayer...