New to Product Designer

Hello to everybody!

I am a step before buying the plugin but i have many questions that not clearly answered.

1. When i purchase 1 extended licence i'll be able to have multiple products to my wordpress site as the preview page such as mugs, t-shirts etc or i have to buy more licences for each product.

2. Can i add my own product as a mask such as a pillow to be designed.

3. Can i use the plugin to multiple sites?

Thank you

Savvas