[Solved]Opera Mini 18 does not show Private Browsing menu item

I have a Samsung Note 8 tablet running Android 4.4.2 I downloaded Opera Mini 18.0.2254.106542. This webpage ( http://www.opera.com/help/mini/other#privateBrowsing ) describes Tools/Settings/Private Browsing but I do not see it in my Opera Mini.

Is private browsing not supported? The webpage mentioned suggests that it should be available.

Thanks,