When scanning system drives for installed SDKs, default SDK version to 5.0 when no SDK version info is available; also updated SDK properties dialog to correctly display SDK version string.
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.2"?>
<plugin>
<extension-point id="featureUseTracker" name="Feature Usage Tracker" schema="schema/featureUseTracker.exsd"/>
</plugin>