Take a look here:viewtopic.php?t=13086
It's the script suggested also in other topics opened for this game (viewtopic.php?f=9&t=1137
Hi Aluigi, I actually have an answer for the topic. Apparently we can extract the files using a karExtractor with MD5 encryption support.
I have the file and a working version for this extractor, but it only works upon a certain version of the game (2014). Any version that is updated after this most likely use a newer format such as GZip but I haven't been able to update it as I'm not as familiar with Java myself.
I've seen posts about it with your replies going back to 2012, if you are still interested we can talk through Discord (Night Wolf#8602).
The good thing is the passwords are still the same, you can actually run the client and read the hex to find the variables all over it. They were stupid enough to call them 'RESOURCE_KAR_PW' and write it in plain text.