I was trying to add paypal payment to my website, I'm using Gravirty form with stripe add-on but not paypal add-on. I happened to find a github repo for the (paypal addon). so I downloaded it then uploaded it to my website and now i have the plugin.
The developer who built the site has purchesed a licence for gravity form but i don't have it as i lost connection with him otherwise i can get the addon from the original source.
Now is what I did illegal or ethically wrong? If so, why such software and other ones are easily found and public on github?
Note: This disclaimer is found on the page "Gravity Forms PayPal Payments Standard Add-On, Git-ified. Synced manual! This repository is just a mirror of the Gravity Forms PayPal Payments Standard Add-On plugin. Please do not send pull requests and issues. http://www.gravityforms.com/add-ons/paypal/ "
Thank you very much.