how to delete copied world?

I copied Newcrest with copy worlds by Zerbu and I want to get rid of the world because it started corrupting my whole game. So I decided to delete copied Newcrest by clicking remove button in the neighbourhoods section in sims4studio and after all the whole save file gets corrupted. Sims 4 doesn't get through the first screen loading because it crashes. What can I do? I really want to delete the copied world but I don't want to start a new game.