To update the Dragon Cam you will need a card programmer capable of programming your loader card.
There are two types of loader card, the Fun 7 and the PIC F84a, if it is a Fun 7 it will have it written on it, if it is a PIC F84a it will have Dragon Loader, or something similar, written on it.
If you really want to get a programmer for the future I would recommend the Cas 3+, as this can program both Cams and Cards.
You have not mentioned what satellites you cam receive, if you only have a standard mini dish for Astra 2, 28.2E, then you will not open a great deal, if you have a motorized satellite dish you can currently open the following packages with your Cam:
Premiere 19.2E, closing down very soon as they are upgrading their encryption to Nagra 3.
Polsat 13E
Digi TV 1W.