@nickwuk I don’t own that specifically named plugin, I have developed the Advanced Shipping one though.
What such notice means (for me/my plugins) is that the plugin is running stable across multiple WC versions and has all features needed that it hasn’t required a update in between. I personally don’t like updating plugins just to update the ‘tested up to’ number; and also know there’s a lot of people who don’t like those bi-monthly updates of plugins that require them to test/verify everything still works after updating. This is why I’ve, so far, decided not to update plugins just for that number.
Again, the plugin is tested and working with the latest versions; if any issues arise, feel free to create a topic and post screenshots of your setup/cart. Most of the time its shipping cache or a conflict in the conditions that prevents rates from appearing when expected.
Cheers,
Jeroen