Yes, this game actually has unlockable modes! Here's the one guide on Steam that details how to access them. 

The Official Setup is still alive on their servers till today. And I just found the file, so it's worth to share here. 

Esta guia rapida de como reparar problemas de guardado de este juego (Incluso este metodo podria funcionar para otros juegos de la misma empresa) NOTA: Habia una guia parecida, pero estaba en otro juego y este ni tenia una en español 

Have you ever wanted to instantly beat a level? Maybe make the game a little bit easier or even a little bit harder? Here's how you can do it without the use of any external software. 

Are you running the Linux version of Steam and experiencing lag, crashes, or bugs when running Bejeweled 2 Deluxe via Proton? This method may be of help to you in solving some issues. Windows users experiencing issues may also try this method. In any case,...