Unpack and Repack *.mcdat files for Light.VN engine games.
Only support files with the .mcdat extension. For .vndat, try Light.vnTools
Usage:

LightVNTool.exe -u/-p/-patch <path to folder>

-u: Unpack mcdat
-p: Repack mcdat
-patch: Make patch to update original content. Keep the directory structure of the output folder. Delete the files you don't want to update, but keep 0.mcdat.json. Then it will gengerate Patch folder. Copy it to game's root directory.