How can I use Free header conversion extension on my shopware 6 website.

Shopware 5 Plugins
1

I am new on shopware plateform. 

I am creating my shop by using shopware 6.  From shopware store, I placed order successfully for “Header Conversion” extension. And in my account section it is listed in “Booking overview” section. But now How can I used this extension on my website.

In my website admin, I did not find this extension. Please help me!!

2

Look for the option „Plugins“

3

Still not listed in my plugin section in admin.