Question about Umodel / Fortnite?

Can one be banned for the benefit of Umodel (in Fortnite)? I mean you change the game files if you pull the file and the exe there in the Fortnite files…

Yes, you can

No, you can't be banned for using UModel. You can also cool websites like http://skin-swapper.com/

I do not want to swap my skins I would like to have the 3d models for Blender

You will not be banned.