Hello Swilliams,
I may have been unclear, using your current assets in a new project is not the same as reproducing this issue in a clean project. Could you try to reproduce this issue in a clean project with new assets (in this case a new widget blueprint because you believe this to be the cause of the crash)? If you would like to provide a copy of the project via drop box or google drive you could do so by sending me a private message on the forums. I will then be able to take a closer look and perhaps ascertain more information as to the cause of your issue.