Upgrading to another 'major' version
If you are using a product with a 'major' version (the first part of the
version number) lower than the latest one, you will need to purchase a
full product upgrade to bring your product up to the latest version.
For example, if you are running Easy-PC version 15.0.x, you will not be able
to upgrade to any revision of version 16 by applying any of the version updates shown here on this
Updates page. Instead, you will need to purchase a Version Upgrade. In other
words, updates for version 16 can only be applied to version 16 installations and
are not backwards compatible.