I was using the trial version to test the interoperablity between CAM, CAD and EST. And using the Trial period for the the CAM license and the 30 day period ended after only 7 days?
If you are a student, you can get the student version that is good for 3 years. If not, I would get in touch with Autodesk to see if you can get the remainder of your 30 day trial. You can chat with them online from this link
