from the readme:
BFC1 Dumper:
This is not a self contained program it requires JO version 1.2.0.10 to work.
This is a loader so you need to place the exe and the DLL into the same folder as the game.
Then you have to run it by the exe that is in the zip.
It will dump all image base compressed files in the map you load. DDS, MDT, TGA, ECT.
It will dump it to C:\TGADumps
This also includes the Color Maps and the tiles that the med can use
the raw dumper did create the folder, but nothing else.