Epic Games Tsw 6 Pc Editor Crashes Trying To Modify Assets

Hi guys! I have a problem with Train Sim World 6 PC Editor.First of all i decided to use in game 4-carriage version of BR442 EMU.But i noticed that if i just open formations editor and add fourth carriage the train will lack third bogie between carriages.So I opened TSW Editor to solve that problem.Idea was simple:I want open BR843 carriage asset,create copy and add to my copy bogie from BR442 head carriage.But when i tried to copy Element 14(wheels) from one carriage to another Editor crashed.What should I do?Has anyone else had a similar problem?