Sorry to hear about the problems you are having with FaceFilter 3.
Does it crash with every image, regardless of the size? It would be worth trying different file formats and smaller sizes to try and find a common link. If you find one that works you can just convert to that format from then on.
It would also be worth making sure your system is fully updated, especially graphics drivers. If newer drivers are available since you first reported the problem, it will be worth updating. You may find the issue is resolved just by doing this.