Hi Michael,
I am sorry for the inconvenience.
First of all, please make sure you have the basic version of our plugin installed on your site.
The premium module works on top of the basic version. You can get it from here.
Get your premium module from here.
Once both modules are installed and active you will find the option to insert your license key.
If you have any confusion, please let me know.
Thank You
documentation
Michael Forey
your documentation is hard to follow. I cant find the swatch settings to add the license