@Frost: I'm not sure what the problem is, but maybe you're using outdated key, since it was updated at some point. I've added reference to the topic with keys to the first post and in case of future updates requests should be addressed there. Also I would recommend to take a look at some umodel tutorials, starting from the one from
tutorials section, for better understanding how you may find assets by scanning and sorting assets in flat view mode. Aside from that there shouldn't be much issues with latest game version.
Indeed it was the AES key, the forum where i was getting the key was outdated, I just checked and it has been updated.
Thanks for the reply!