The VG Resource

Hi,

i have been ripping Shining Nikki for some time now and everything was fine until now. I usually use VGMtools to remove 8 bytes and then use AssetStudio to access the files and export them. This always worked until now.

Now, when i try to access the files with AssetStudio, I get this message:
 

I'm not sure what's happening, but i do know that the game had some type of update. 

Thank you for your help, in advance!