If your Model has an EMU then YES..
Just go to Menu > Parental Lock > Press OK.
Red Button on the Bottom must be visible = ON.( Goto Key Manager)
Press the Red Button on remote.
Scroll down and Highlight Nagra > Press OK
Scroll Down to 0X21 DigiTV 18 = 00 Key.
Scroll Down to 0x22 DigiTV 19 = 01 Key.
Choose the Key to Edit > Press OK
Now Edit the Key with the New Keys..and Presto.
Exit and Save.