Hi, please go to https://toolset.com/account/sites and click the trash icon next to the key you have created for your site. Then create a new key for the site without www in the URL: hidden link. Copy the new key, and go to your wp-admin area. Go to Plugins > Add New and click the Commercial submenu. Scroll down to the Toolset panel and click the "Unregister Toolset from this site" button if it is visible, or click "Register" if it is visible. Paste your new key directly into this field, and try to register again. If this doesn't work, I'll need to take a closer look.