As I said in my previous response:Free trial doesn't work.
To be very clear, there is no free trial available as of now. I once again apologize that the website doesn't make note of that but the new 1.1 update should be available this Saturday; and will have a free trial option.The version you downloaded was still 1.0, which has no free trial option.
I just tested by downloading from the website and inputting a license key and it seems to be functioning fine. When you just tell me it's not working I can't really help you. If you want, you can provide me with more detail and I can try to fix whatever issue you're having. Otherwise, the new more stable version will be out in four days from now, if you would like to wait.In fact, now I can't even use the older version.
When 1.1 comes out, all previous 1.0 installations of Cosmil should prompt you to update automatically.