People have a very big misconception of how AnyDVD works. When a version is released, it contains ALL the AACS keys for movies in the database at the time of release. However, AACS is not the end of the story. BD+ protections require replacement sequences and AnyDVD can do older ones without the OPD. New discs will require the OPD to download the replacement segment information. That then gets cached. The stupid screen pass protections are also cached, as well. So there are some things that are built in when you update AnyDVD, other things that still need the OPD.