"What to call WIKIs" not functioning

In settings i can set "what do you want to call WIKIs - but when i change this to "Articles" that word is nowhere to be seen, front nor backend.

In the botton there's a commercial to "upgrade now" but when i click that (i THOUGHT i had the paid version!!??) i am brought to "E-commerce" which has nothing to do with the WIKI-widget.

What's all this?