Stopped working with NZ addresses

I have been using this plugin for several years. I have a small business with less than 75 lookups a month for AU & NZ. Last night I was alerted by a NZ customer that when he added his address, he received an error message that “this service is not enabled on your current plan”. So I went to the address finder website and could not find out why it was no longer working for NZ. I can only assume that, because I am on the free plan, NZ has been removed without warning.