Service releases that fix reported problems and minor updates that introduce new features are available from the Downloads page. Licensed customers can download and use service releases and minor updates for free.
Major updates introduce significant new features or major product changes. Major updates are only free if a grace period was announced at the time you bought the product.
(A minor update is a new product version where the second number in the version number changes, for example v1.3 to v1.4. A major update is a new product version where the first number in the version number changes, for example v1.4 to v2.0.)