Does Nitro Pro 11 license expire?

[Rob La Hue]

I have a Nitro Pro 11 license that I purchased (updgraded to) in 2017.  About a month ago I started getting emails trying to get me to upgrade to the latest version, which I don't want or need, so I ignored them.  I also started getting a popup every time I opened Nitro Pro saying my trial version was about to expire, which now says my trial version IS expired.  I kept closing the dialogue box thinking it was just marketing and would eventually stop - it hasn't.  Well, today I realized that I no longer have access to some of the tools I used to have and my version now shows Nitro Pro (Expired Trial).

I'm almost certain when I upgraded to version 11  it was a lifetime license.  Am I wrong?

Edited February 27 by Rob La Hue
grammar correction

[Leslie V]

Hello @Rob La Hue
Thanks for reaching out to us! I am happy to assist you.

You purchased a version 11 key and it is still active.

Please note that we no longer support Nitro Pro 11 and its activation servers have been shut down.

We recommend to upgrade to our latest version, V13, which comes with significant stability and security improvements, as well as many feature enhancements, in particular in conversion and OCR functions. To upgrade to Nitro Pro 13, please visit our upgrade page: 
https://www.gonitro.com/pro/upgrade
 
Alternatively, you can upgrade to the latest build of Nitro Pro 12. Per our Sunset Policy, https://www.gonitro.com/nps/product-details/sunset-policy, we have stopped making feature enhancements to version 12 once we released version 13. You can find Nitro Pro 12 installer from the page below and activate it with your current Nitro Pro 11 serial number.

https://www.gonitro.com/nps/product-details/downloads
 
Please let us know if you need any further assistance.