So queing rendering used to work just fine.
Now, I have some models loaded up, and once I que the first rendering, I can't change the camera, materials, lighting or anything in the main screen. It won't respond or update until I have rendered the image in the que.
I am using the latest version of Keyshot 4.
I have the same problem with V5.3. One work around is after adding to queue, save and reopen the .bip. The scene will be free'd up and the job you added to the queue will still be there. Not the most elegant solution, but keeps things moving...