For those who use worldbuilder like i do you might have noticed that worldbuilder doesn't work for edain 4.3 the only way to get worldbuilder to work is to:
1.open up the edain launcher.
2.go to options and tools.
3.change the language to deutsch(once you've changed it the launcher will close).
4.open up the edain launcher again then close it.
5.start up worldbuilder.
everything in worldbuilder is still in english btw and all you have to do is just switch the launcher back to english when you want to play the game.