The Deck Studio application isn't available anymore, because the developer removed it. It's uncertain how it got on your system, but nowadays, most of the applications get installed through the installation of others. The Deck Studio was used to build decks for Yu-Ghi-Oh card game. You can't download it anymore because it's not available. To remove it, use Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.