Please ensure that you are not using the Overlay View feature on a display board. If you are in Overlay View you will not be able to move around the environment. You will have to right click on the board in front of you and choose either '3D View' or 'Snap View' to be able to move around in the 3D environment.When your cursor is hovering over a board in 3D view this disables the movement controls. Move your cursor off the board and movement controls will return.There are rare occasions where your controls may become locked. If this occurs, leave the session and re-enter.