We are currently investigating this crash issue. To help us in repro this issue and fixing it ,I would like to gather some more info from you -
1)You mentioned about painting and animations - What were the steps you were performing in these features when the crash happened?
2)Maybe you could share some of the animations which were used in your project?
3)Do you have any version of the project saved earlier or any similar project?
We will get back to you as soon as we get some more information about this issue.
Thanks and regards,
Adobe Flash Professional Team