In reading your WordPress missing manual, chapter 9 about managing plugins I followed your advice and checked the "Compatible up to" and "Last Updated" of all the plugins I have, including the One-Click Child Theme Plugin that I previously installed, following your suggestion in chapter 13.
And this is what I found:
Compatible up to: 3.2.1
Last Updated: 2 years ago
Is there another plugin I can use? How can I check if it is working with WP 3.6?
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There does not appear to be compatible version of this plugin that will work with WP 3.6. As you pointed out, it's not been updated in over two years, so it's unknown if they will release another version of it. I would recommend that you contact their support to see if there is another similar plugin that would meet your needs.
Sorry I couldn't have been of more help.
Customer Service Rep,
It looks like this plug-in has been discontinued, and I don't recommend using it. (It may still work, but there have been a couple of reports of theme-specific problems.) If you don't want to create your own child theme by hand, you can try the Orbius Child Theme Creator (http://wordpress.org/plugins/orbisius...) which performs a similar task. However, I haven't experimented with this plug-in myself.
see the change log