An English User Guide is available from the Fortec Star website (Google search it, mate). Free download in pdf form.
Can't see any "secret menu"
The nearest thing to a secret menu is MENU, Tools, you may need to input the code (default code is 0000), and one of the options is a software upgrade by RS232 cable from your PC.
I seriously doubt whether you will be able to clear ANY encrypted channels with your FS4200 box, if that is what you are trying to achieve.
At this time I think all of the major providers are using encryption which is unbreakable.
Card Sharing or a legal subscription is the only option, but you can't put a card/cam in your 4200!
Good luck!