Its a good app but its getting annoying

I love this editor, its what I use for vine, but now every time I try to work on my project (which in fact are only 6 seconds long) it always crashes. Especially when I try to play. it I tryed pro, and the free version and yet it still crashes. So please! Fix it or Im gonna have to move to video star
(Please, I dont wanna waste my money on video star)

Kai.ne about Cute CUT Pro, v1.8