wonderful app, fix the bug

This is a great app, I use it for all of my collages. Its very easy and efficent! The only problem is every time I got to make a new collage or switch photos, the screen turns black and the app crashes! I have to delete the app and redownload it to make another collage /:

Poo.on.a.stick about ProCollage - Photo Collage Maker & Photo Stitch Creator