Custom Portfolio Entry Settings (Slug) and translation.

I have carefully read and followed http://kriesi.at/documentation/enfold/translating-the-portfolio-slug-with-wpml/ but it is not a solution for me. I do not find the screenshot shown in the article.

I have changed the custom portfolio entry settings in German language. I can search all strings in WPML string translation for that new/ own slugs, but WPML does not find them. And – as said before, I do not find the screen You show in the article.

I even switched to Englisch as admin language to follow it, but it starts with having NO “WPML > translation options”.

Please help!

Thank You,
Thomas