Can not get Patterns Panel to display in Photoshop CC 2019

The problem is:

I can not see a Patterns Window option shown in the drop down list from the Windows menu

This set up is:

Mac OS 10.13.6 and Photoshop CC 2019 20.0.9 (using a Symmetry Shop plugin)

I spend most of my graphics time in Illustrator using Symmetry Works and much less in recent versions of Photoshop CC so I am likely to be missing something extremely basic here. 

See image below: no option for a Patterns Window

I have been into the Tool Presets to try and get it there.

No joy.

I am able to see Patterns as an option in the Presets Manager (see second image below)

But whatever I click I can not get any Patterns window or options to choose any pattern swatches from my Photoshop workspace after closing this dialogue box.

How do I get these (or any) Patterns into my Photoshop workspace?

I have tried this video

https://helpx.adobe.com/photoshop/using/presets.html

which assumes you have a Patterns window to manage but I don't.

If anyone could please give me any advice I would appreciate it enormously.

Thanks for your assistance.