Dear Frank & Svein,
Thank you so much for your support, I'm advancing!!.
Now, after changing header file to <meta name="generator" content="Google Web Designer 1.6.1.0620" />, I can open the html file, view the complete page, but I get the error "Cannot read property match of null", so I can't continue, I can't see the code page, neither the preview page, and so on... It seems that I have to change some parts of the code, but I'm lost. Any idea?.
Thank you so much again!!.
Best Regards - Javier