All 2.x versions of Ping Plotter are a free upgrade. The first version 2 was released in July of 1998, and people who bought then are currently getting free upgrades. We're up to version 2.41 right now - so there's plenty of room left for more upgrades in there <img src="/forums/images/icons/wink.gif" alt="" />.

Of course, there are no guarantees in life, including in this case, but we don't have any plans to obsolete the 2.x version line.