I have found out that the only way to reset the scores for this application is by removing it completely. I have also deleted the files from the installation directory, and it didn't worked. After I removed the game and reinstalled it once more, the scores were set on 0 giving me the possibility to add other entries in the High Score table.
- Note: The game is not available for download from the official website if you plan to reinstall it. You will need to acquire it from the a 3rd party website.