Could you please confirm you don't have anything else open that might be accessing the camera such as Skype, Gchat, etc. and have you restarted your computer? Since you said the previous versions worked these might not be the solution, but I'd like to rule something quick and easy like this out.
If you continue to experience this behavior please open a support ticket and we'll try to assist you. In the ticket please include an overview of your experience as well as the following system specs:
Make and model of camera and how it's connected