Indeed, Wiris has changed its UX and API and we no longer support their implementation.
Can you please create a feature request in our Feedback portal
-> sample applications? If there is enough demand for it we will try to update the article.
If it is urgent and very important for you to have integration with the third party Wiris editor, you can use the help of our Professional Services
Do you need help with upgrading your ASP.NET AJAX, WPF or WinForms projects? Check the Telerik API Analyzer
and share your thoughts.