Hi Mike,
Thanks for reaching out and thank you for using our BoldGrid Premium services. If your premium plugin membership expires you will no longer receive updates to the plugin and you will lose more and more functionality over time.
If you would like to renew your subscription you can contact a specialist in our Premium Support channel and they can help you get your services back up and running correctly.
I hope this helps. Please reach back out if you have any other questions for us.