To kill all animation, set the actual time to zero ( = time-slider to zero, or, in the recorder-style group of buttons down left, the leftmost button), 'select all' (or just the animated things) -> menu item 'animation' -> delete object animation, deselect. Close the timeline by clicking on the 'clap' button at top right of the interface, re-save the scene. Animation shouldn't show up any longer. :-)