How do I upload it to my WordPress Site?
Upload it as zip in your WordPress Dashboard. I made a little video explaining that:
With a key, you get all the Premium features. You can purchase a key here.
To activate it, go to WordPress Dashboard → Settings → Divi Filter. Here you can add it.
You don't need a key for the Divi Filtering to work, but it's recommended because then you receive all the Premium features like:
- Filtering Rows
- Filter Animations
- Style Active Button
- Start already Filtered