It seems that you are dealing with a dynamic WPF window title and the title name is based on the current date. In order to make this to work every time you run the test, you need to change the Caption property for the WPF Window. Use tilde (~) to indicate a partial match. See here
for more information.
For example, if the value of the Caption property is:
You can change it to:
Please give it a try and let me know if it works.
All the best,
the Telerik team