Hi,
I've just tried to install JF Texturia through your quickstart package.
Top menu problem in this case is solved, however I stepped into another trouble.
The bottom slideshow, the one under "Some other good stuff" into your demo template, doesn't work properly. Please see the screenshot attached.
I haven't done any modification to the code, I've just done the updates to Joomla 2.5.4 plus the other ones about JoomGallery that appears under "Joomla Updates".
Best regards