Stripping links from PDFs - student work considerations

Hi, sorry to jump in, I’m desperate here. I cannot even manage to do this, what did I’ve missed?
" To open the sidebar, go to Add-ons → Paperpile → Manage Citations. To export a copy without the citation codes, go to the gear in the sidebar → Export. "

Here’s my screenshots:

Nevermind, but should anyone want to read how to figure it out (with pictures) here is the links: