I just started using Unity 4 + Vuforia for development and can't manage to test Webcam Play mode whilst I have activated the 30 days trial for the Pro version of Unity 4. The Play mode run I can see the framemarker but nothing else than white background around.
I still have the message in the AR Inspector : "Play mode require Unity Pro license!". I tried to troubleshoot and can't go any futher than qcarCheckNativePluginSupport() function that seems to throw an exception when called in webcameditor.cs. Can you please help me?