Hello,
I have made these operations to play my purchased Bluray diskcs (Full HD discs only) in MPC-HC (64-Bit version).
Load https://github.com/clsid2/mpc-hc/releas ... 10.x64.zip
and extract the .zip file to Desktop
Load https://github.com/mcmilk/7-Zip-zstd/re ... td-x64.exe and install 7-Zip
Load libaacs/libbdplus DLLs https://mega.nz/file/ZM91CL5Q#VIm1IKA_q ... LwlkINByek and extract the .7z file to Desktop
Open \Desktop\2020-07-26_libaacs_libbdplus\2020-07-26_libaacs_libbdplus\win64and put the 4 .dll files to MPC-HC main folder. In this case to\Desktop\MPC-HC.1.9.10.x64
Go to \AppData\Roaming and create folder with this name: aacs
Load the keydb.cfg file, in this case I loaded the english keydb.cfg file. http://fvonline-db.bplaced.net/ -> http://fvonline-db.bplaced.net/fv_download.php?lang=eng
Put the keydb.cfg file to aacs folder = \AppData\Roaming\aacs
Put the Bluray disc into Bluray player and open MPC-HC.
In MPC-HC click File -> Open Disc -> select the Bluray Disc and immediately the video starts.