Upon launching the plugin for the first time, you will be prompted to enter your purchase code to activate the license on your website.
To locate your purchase code, navigate to the Codecanyon downloads page. Click the Download button next to the E&P Forms Builder plugin, then select License certificate & purchase code (text) from the dropdown menu. Your purchase code can be found in the downloaded text file.
If you wish to deactivate the license on the current website in order to activate it on a different website, simply uninstall the plugin from the WordPress plugins page.