Hello,
Thanks for the reply.
You already registered purchase code of the theme for your account on our site, so you are able to download the latest versions of plugins from this page – https://www.8theme.com/downloads/
We do not provide any additional purchase codes, because they are not required. You do not need register plugins on your site “Registration of these plugins is not necessary. They will function perfectly without any need for activation.” Just install plugins and use them (manually or via XStore > Plugins Installer). If you face any error or problem provide a screenshot, describe them, and we will help.
I hope it is clear now. Let us know if you need any further assistance.
Regards