Why would You think this plugin would extracting VFS from specific game?
Extractors-rebuilders and ripkits are often automatic tools which repacking VFS with dummied videos/audio and/or relinking LBAs in LBA tables (kind of game internal security layer).
I believe a lot of plugins are lost because they (the same with CRC, another tool which You can check) was attached to threads on alucard.cc forum (home for both tools) which was one day down and there are no snapshots made by web archive sites crawlers. My artefacts in AIO have most of the plugins for Xpert v1, v2 and CRC but for sure not all (the same goes for ripkits and similar tools which was hosted only there back in days).
You can also not been auto-suggest by file extension. It doesn't matter. Many dev studio across different games using the same VFS formats, just differently named. Including Square-Enix.
You can also try different approach. Instead of unpacking VFS (virtual filesystem in other words, or just archives if You prefer that name), You can try find audio stream like ADPCM (using by most of games on i.e PSP and PS2). Tools for it are MF Auidio (but You need to put correct i.e start address). There is no solution for You on a silver platter because every game is different so it is not something which can be the same for all cases.
Another solution is just looking for official soundtracks (which seldom contain all game audio) or scene special modules like PSF, ripped to that form by others in a way which I don't even understand.
Oh, and You could ask peoples behind BMS to write for You script. One day I'm looking a script for National Geographic Africa game on PS3, and someone wrote it.
