If you have purchased Jungle Ide (full version) after being a Jungle Demo/Lite user, the only thing you have to do to convert your Lite version to the Pro version is install the setup that came with your purchase confirmation email. You don’t have to uninstall the previous demo version, as it will replace it properly. All your settings and preferences will be kept between versions.
Once you’ve installed the full pro version, be sure to enter your license number and username (case sensitive) in the preferences dialog of the IDE in order for it to be able to download all updates.