I purchased LimeWire v2.0.2 Pro a couple of months ago.

Today, when I ran LimeWire, I got a pop-up that says that a new version is available, v2.1.3. It asks if I want to upgrade.

When I answer YES, I am taken to the regular Limewire download page at

http://www.limewire.com/index.jsp/download

Here, there are options to download the Free version, or buy (again) the Pro version.

How do I upgrade my existing 2.0.2 Pro to the current rev of Pro?