Hello Zoltán, 

thank you for your message. 

Unfortunately and with the resease of the newer versions, the direct technical support for WebSite X5 Version 8 is no longer avaiable and we do not offern this kind of service anymore. Please read more about this here: https://helpcenter.websitex5.com/de/post/101940

Still, you can have the iwp file converted by a member of the community. I kindly suggest you to leave the topic public, so that everyone can read it. I am sure you will find someone willing to help you as soon as possible. 

Thank you for your understanding. Kind regards.