Hi,
Your only option is to buy PowerDVD. You maybe paid $1 for PowerDVD 9, which lastest you over 6 years. That's definitely getting your money's worth. Problem is Sony probably stopped paying for the free updates you were getting to play the latest BDs over those years.
Unfortunately this is the world of Blu-rays and content protection from the movie studios. We the consumer have to pay to continue watching, and we like to take out our frustrations on the middle men (Sony and CL).
Dave