Hi,
Using the files provided by dbc211 I was able to recreate the issue. I did not see a crash event when loading the project, but whenever I tried to open one of the Blueprints that you provided the Editor would crash, so we are making progress. I was also able to open all of the Blueprints in a 4.1.1 project without any problems. I will give this information to a Developer for further investigation. We really appreciate your patience and help with this issue.
Thanks,