Hello William Cole,
We have tried to recreate the same scenario with our local environment. But not able to recreate the same.
When you click the update available button it re-direct to our website in your default browser. Please check your browser.
When you click Help|Check for updates. if you are using the latest version, AxCrypt pop-up shows like that “You already have the latest version!“.
If you are using the old/previous version AxCrypt pop-up shows like that”Version 2.1.1617.0 available”
Still, if you are facing any issues, please provide detailed information about the issue and some screenshots and write a mail to support@axcrypt.net. We are happy to help you.