Hi @livelung! Looks like you’re a long-time customer but a first-time poster here in the forums — welcome. 🙂
If you’re seeing that notice, it means that your plugin is registered to a different site. If you want to check where the plugin is currently registered, log into this site, head to My Account > Downloads and follow the steps in this article to identify where the license key is and whether you need to move it.
Will this work for you? Please let me know.
Cheers!
Geoff