Help - Umodel error

Hi all,

First, sorry for my english, it's not my native language.

I have problems with UModel. I searched on the web but I haven't found a solution or tutorials that can help me.
1 - I unpack UModel in Steam and I run it.
2 - A "CookedPCConsole" folder is created with upk. Nice.
And (this is where it gets complicated) : 
3 - When I want to export or open a file I have a "wrong tag in package" error.

The question is how to exploit .upk? Can someone help?

[img][/img]