Disappointing editing and sharing...freezing app

I have been bragging about Filmic as friends watch me record events. However, recently I tried to excitedly correct my white balance it got stuck 85% of the way there. I then tried to export to iMovie to edit and find that the app is frozen and destabilized my iPad. I then had to do a hard reset. Huge potential, but disappointing results.

Gadget Girl2 about Filmic Pro－Video Camera, v5.4.1