Great app - one request

I love this app, it does exacatly what I need it to do, but just one request - could you PLEASE make the background color beheind the animations a selectable color? The images that I morph are on a white background, and the program always puts a black edge around them when they morph, which I then have to remove in Photoshop. If I could have them on a white background it would be PERFECT! thanks!

BillyLee about MorphX