Steps to reproduce:
1. Choose Sprite
2. Choose "Edit animation"
3. Open a new Picture for Animationframe 0
4. Klick "x" to leave options
c2 crushes and I have to restart it. Since I've updated c2 this morning. In every project the same problem.
Close "edit animation" and save new pic for sprite
Operating system & service pack:
Win 7 64-bit
Construct 2 version: