Use VLC (with libaacs and KEYDB in the right location) to open the Blu-ray folder structure directly—not an MKV, the actual BDMV folder. If it plays menus, your key is valid.
— Keep FindVUK updated. The tool regularly adapts to new AACS versions (MKBv70+).
That’s like having a master key but never making a copy for your security team. FindVUK is an open-source Windows tool (runs fine under Wine on Linux/macOS) that does one brilliant thing: it extracts AACS Volume Unique Keys from both MakeMKV and PowerDVD and aggregates them into a clean, shareable KEYDB.cfg.
Point FindVUK to your optical drive letter. Enable the “Monitor MakeMKV” option. Tell it where to save the output KEYDB.cfg (usually %APPDATA%\aacs\keydb.cfg on Windows or ~/.config/aacs/ on Linux).
But here’s the catch: modern Blu-rays use (Advanced Access Content System). MakeMKV handles decryption on the fly, but for deep integration with Kodi, Plex, or Emby—especially for Java-based Blu-ray menus —you need a map of the Volume Unique Keys.
Open the KEYDB.cfg in a text editor. You should see an entry like: