I have version 1.1.4 loaded on my PC. Are there any updates available that I can install using my "key code"?
No, because the official web page domain has expired and the application seems to be discontinued by its developer. If you're looking for an alternative, you can check Software Informer database. Personally, I recommend you Java Sudoku, Pure Sudoku and Simple Sudoku because they are free of charge and easy yo install.