Importing PDF in WPX5

I've been WordPerfect user for 25+ years. Had been using WP12 last few years. Just installed WPX5 yesterday. I have an incredibly simple question but haven't found an answer yet.

Trying to import/open PDF files in X5. Help page says to click File> Open PDF. I have no such command on my File menu.

If I try to just open a PDF in X5, I get 'Unknown File Format' message. Do I need to need to somewhere link PDF to the WP app?

Help, please!!