Updated but plugin disappeared

Ok, it works after deleting the previous plugin.

I want to update to premium but the site doesn’t work:
https://plugins.thewpnext.com/woo-free-product-sample

https://www.thewpnext.com/downloads/free-product-sample-for-woocommerce/

Is this available?
“Custom shipping class & tax rules: Set shipping class & tax rule for the sample products.”

Before I go to premium I have to know this is included ??

Well?

Also, when I use the free version and add a normal product to my cart, it adds it as a sample. So people are not able to add the products to their cart.

I need these kind of things gone before I can purchase the premium. Beware that the free version is your selling point.

Which theme are you using? Can you give me the website URL?

Theme = Neve Pro

https://www.don-edgar.com/