Wow, I don't know what it could be.
Another guy in this post tested it and it worked, here it worked and in a group I'm part of they tested it and it's ok
It seems to be a configuration but I sent '\config\custom_configs' that were posted here and they are perfect. The '.exe' copies the 'USB KEY' from the 'patches' folder, check this.
rename your games to SCEEXE444 (Tekken6) and SCEEXE888 (Tekken6BR). Now in the root of the emulator extract my .zip (all files and folders) replacing everything.
start 'Tekken 6 - Bloodline Rebellion [SCEEXE888].exe' or 'Tekken 6 [SCEEXE444].exe' in the emulator folder.
press 'Esc' to close
eboots MODs and other files
https://gofile.io/d/h4roD6
That's right. But you need to clean it first because not all games have the same files and if there are any left over, it gives an error.
See an example in the game Dark Escape 4D...
Dark Escape 4D-[SCEEXE333].ahk
I did this for the frontend using AHK.
With each game opened in the frontend, AHK clears the patches from the previous game and places them from the current one.