Apparently, it does not work in 6.1.1 CE GA3: the 'search' field and button do not appear.
Excellent plugin. On more further development idea, it would nice if the plugin could combine the settings that are stored on database and portal.properties and show which is active.
It works fine, but lacks an important feature that its earlier version had.
When the value is larger than a (short) predefined length, there is no way to display the whole value.
Its earlier version "props-n-prefs-portlet-188.8.131.52.war" (which I happned to have saved in my file system), displays an icon that pops up a window displaying the whole value.
Except for that, this is a must.