Force Close Problems

I am using a Macbook Pro Retina display with an Intel Core i7 processor, running OS X Yosemite, and tethering to a Nikon D90 camera. We use it to for product photography and it is very helpful, when it works. It allows you to choose what folder you would like the images to be stored in as you take the pictures and the display is perfect for what we use it for. However, sometimes it will not connect with the camera, but lately the problem is that Sofortbild will close as soon as I snap the first picture and will not allow me to use it at all. Is there other troubleshooting I need to do in order to fix this besides restart it, completely shut down in safe mode, and restarting the application?

PTJAC about Sofortbild