Hi
I saw you found the answer, but just wanted to confirm:
Yes correct the plugin payment is for one year of support and updates. The plugin will still work after the year is up and you do not renew, but you will not longer get updates or support here on the website.
Here is another question though would you discount the price for a not-for-profit organisation?
We do offer the plugin based on the status of the non profit.
We reserve the right to refuse partnership with any organization at our discretion.
The application link is here:
https://tri.be/apply-for-nppp/
Does that help?