Hello Cesar,

Version 12 was the first version of WebSite X5 able to produce responsive websites.  You would need to upgrade:

https://answers.websitex5.com/profile/offers

If you upgrade to version 12 now then you will also receive version 13 free-of-charge when it is released in October:

PURCHASE GUARANTEE
Those who have registered WebSite X5 Evolution 12 / WebSite X5 Professional 12 during the Beta Testing period (between 31th August 2016 and the date of release of the official version) will be sent a FREE DOWNLOAD link of the new version of WebSite X5 Evolution 13 / WebSite X5 Professional 13 on the launch date 11th October 2016.

Kind regards,

Paul

Thanks Paul, will do.