What is the pricing policy for future upgrades of Notation products?
All sales of Notation products include free updates within the major version, or a free upgrade if the purchase is made within 180 days of a major release. So for example, if your purchase was made for version 2.0, then you are entitled to free updates up until (but not including) version 3.0. If your purchase of a 2.x product is made this week, and next week version 3.0 is released, you would get a free upgrade to version 3.0.