The cut off date is 31 January 2005. See this thread
If you bought your licance from DvdFab.co.uk prior to that date fengtao will honour your licence and provide a key for the updated program.
However, if you bought it after that date, you bought it from someone who had no authority to sell it to you and you'll have to seek a refund from the seller. [Nb: If you like the program, buy a legitimate licence; program development costs money and the developers have to eat too. ]