Just for the record here.
The issue was that he didn't have the game installed properly so it had a few missing files that made it crash.
Always make sure you use the installer the first time so you are not missing any files.
I added the model and texture IDs to the item wiki, so you can find the specific file in the model/texture bundles.
As well as adding model and texture "overrides" so you don't have to change the game files which are updated by the launcher.