So if you look for the game.rxdata file in the folder there, it is the active save file. If you rename it to something other than game.rxdata or move it, then the game will allow you to start a new game as it doesn't notice any save files.
The other things in there that have a time, badge number and name are back up saves, and you don't need to worry about them. They don't do anything unless if one of them is renamed game.rxdata.
Once you've moved or renamed the game.rxdata file, start a new game, and save, then a new game.rxdata file will be created. Then that will be your active save file. If you ever want to go back to your original file, rename the new one something else, and make the original one game.rxdata. Pretty much, whichever file is called game.rxdata in the correct folder, will be the one your game reads.