The XMCD, MCD converter is not working on the Demo version?

Hello, 
After many years not using Mathcad, I wanted to load my old datasheet developed in Mathcad 15. I have set up the free version just to have a sense of “Whao.. I like it” but it turns that the converter is not working: no license but I have a license for 30days no?
Please Is there someone to help? I would like to see if the Prime (mathcad12.0) fits my new needs. thanks!
John