Red X show stopper bug

What causes this? It happens to me seemingly randomly at least once a day, has no warning and gives no reason. Just clicking away and bang, it's dead. Can't even exit, I have to CrlAltDel and kill it from there. I have to basically save after every single thing I do to avoid losing work and its getting really old.

For what its worth Event Viewer says 

The program Storyline.exe version 3.62.27443.0 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Security and Maintenance control panel.
Process ID: 3564
Start Time: 01da68b9b0c1be9a
Termination Time: 4294967295
Application Path: C:\Program Files (x86)\Articulate\360\Storyline\Storyline.exe
Report Id: 33f5f858-93e2-4f8e-a756-5f88d9bf4610
Faulting package full name:
Faulting package-relative application ID:
Hang type: Top level window is idle