SoapUI forces native look and feel on the UI on Mac OS

First, I deselected 'Use Native Look and Feel' from UI settings.

Then I selected "File | Save Preferences"

Then I exited SoapUI.

Soapui-settings.xml now seem to suggest SoapUI is configured not to use native look and feel:

</xml-fragment>]]></con:setting><con:setting id="UISettings@native-laf">false</con:setting><con:setting id="GlobalPropertySettings@properties">&lt;xml-fragment/></con:setting><con:setting id="GlobalPropertySettings@security_scans_properties"><![CDATA[<xml-fragment xmlns:con="http://eviware.com/soapui/config">

However when I relaunch SoapUI, still stuck with native look and feel. Here is log on startup:

Mon Aug 04 07:32:11 CDT 2014:INFO:Defaulting to native L&F for Mac OS X

How can I truly deselect this native look and feel option?