The DMC program crashed during tracking and when I opened it again it displayed a message that the program trial period had expired and export was not possible. I have only been running the program for two days.

We are looking into that problem and will get back to you as soon as we have a solution.
A workaround is to install evaluation version on another PC, or re-install Windows.

I downloaded trial beta version .. and it crashes for me, while tracking too :) I hope, you will repair it .. and i will buy it.

Current version is know to crash on Vista when Vista shows a UAC message. This will be fixed in future versions.

If you noticed crashes in some other situations, can you please post a more detailed description.