To deactivate your license you only need your Envato username and your purchase code.
Go to General Settings > Plugin Activation.
Next, to gather your registration information, visit codecanyon.net
1. Envato Username
This is the username you chose when you created your Envato (Codecanyon) account.
2. Purchase Code
Visit your downloads page and next to Master Popups, click on “Download > License certificate & purchase code (text)”.
Then open the purchase receipt, and inside, copy the Purchase Code.
Enter your personal email to get in touch to provide support in case of any problem.
4. Activation Type
Choose “Deactivation” to activate your license.
To Deactivate your license choose “Deactivation” and then enter the domain in which you want to deactivate the license.
Deactivation can be done from any website. That is, you do not need to be on the website that you are going to deactivate. You can do it from your new website.
5. Click on “Validate Purchase” and Save Changes