Done, just sent it 🙂
Hey there, if anyone stumbles on this same problem of having Spine crashing when trying to copy an animation, there is a really easy workaround:
Just create a new animation, then go back to the animation that you want to copy, select all keyframes and copy, then go back to the new animation and paste the keyframes there. Yeah I know it sounds kinda obvious, but if I could save 5 minutes from someone, I'm already happy! 😃
That seems to do the trick while the Spine guys take a look at that bug! 😉