add paramater to allow cache to be deleted or not when a refresh is done (you don't want to delete the cache on disk in the case of Symbian SDKs b/c if the IDE quits abnormally the cache in memory is not written to disk.

<?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>