Storyboardpro 5 won't stay open on my MacBook Pro

Earlier today I was able to open a project in Storyboardpro 5 and work. Then I got a message to update and I did. Now when I open a new file or an old one, the application opens the file then the file reduces and disappears.

If anyone can help, much appreciated.

I’m using all current software on a MacBook Pro, OS X El Capitan 10.11.4