Rive editor has crashed several times today and work was lost. Once when I accidently hit delete to remove one of my animations and then tried undo (did not want to remove the whole artboard, just this current animation. The correct way would be to right click on that animation and delete it). That whole artboard is lost and all data in it could not be recreated when restarted.
Crashed again when I was just animating with a bone rig and setting Cubic easings.