Hello Bondan M.,

You can upgrade to version 13 free-of-charge if your registration of version 12 was made between the dates referred to in the following article:

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.

ref: https://helpcenter.websitex5.com/post/153330

Kind regards,

Paul