Can’t edit the button link? How can I do this?

Thanks for the interest in our plugin! No, it is not possible to change the link.

ok and how can I change the dummy products that show when this button is clicked. I have sent a test email and when clicked the button, it shows some random products that are not from my products.

How can I remove those dummy products and display mine?

Dummy products are displayed on test review forms. Normal review forms will display product recommendations as explained in this article from our support portal: https://help.cusrev.com/support/solutions/articles/43000592925-product-recommendations-on-review-forms