>The license entitles you to receive lifetime updates for the major version.

Where does it say that?

That is common and it is the model I use for my own software. But that isn't what I understood from their website.

Home page: "Pay Once, Use Forever. We hate needless subscriptions as much as you do. TextQuery comes with a perpetual license with free updates."

Pricing page: "Perpetual license Lifetime updates"

Which strongly implies every update is free, forever.