Storyboard pro keeps crashing. I can't use it at all.

I downloaded the free trial version. I had 17 days left on it when it suddenly crashed. After uninstalling it and re installing the same trial version, I still have the same problem and cannot open the program at all. I want to buy the program with monthly payments, but I need to know if I buy the program will it work or will I keep having the same problem? When I try to open it, it minimizes itself until it disappears. Im using a macbook pro with OS X El Capitan. It has 16 gigs of memory. I really need this program, please help.