Hola Andrés Barros, si es compatible. Si compras ahora asegúrate que sea directamente a Incomedia y no a un distribuidor así aplicas la actualización gratis a la v12 que está en pruebas Beta.

Saludos
Jorge M.

Referencia:

https://helpcenter.websitex5.com/post/126550

PURCHASE GUARANTEE

All those who have registered WebSite X5 Evolution 11 / WebSite X5 Professional 11 * during the Beta Testing period (from 01.09.2015 to the date of release of the final version) may request to receive the new version of WebSite X5 Evolution 12 / WebSite X5 Professional 12 for FREE in download.

* offer valid for copies of the software purchased directly from Incomedia at full price. The offer is not valid for licenses purchased from Incomedia partner. More information will be available on the website http://www.websitex5.com after the release of the software