You can just extract/merge my files into your v1.03 game folder and it should work.
Edit: If your game is not unpacked yet because you got it from a different source, then you need to follow these instructions:
To extract and play the game you might need to set your system locale to Japanese(Japan) or use another locale method.
Before you can apply the MTL you need to extract and then move or delete the "Game.rgss3a".
You can do this using the rpgmaker "All Decrypter". I will add a version as attachment.
Just run the "RPG Maker Decrypter.exe" and choose the "Game.rgss3a". Then move the newly created folders from the "Extract" folder to your game folder and then move or delete the "Game.rgss3a".
Start the game once to confirm this step worked correctly before merging my MTL into it.