The first thing to try, as always in Software, is to restart your Mac. When this doesn't fix the problem please contact me from Preferences -> Advanced -> Send Feedback.

When you restart the Application after a crash, a window should automatically open; from there you can send your Support ticket making sure to add as much information as possible abut what you were doing right before the crash occurred.

Adding Informations

The next step is to provide a "Sample" of the Process, if the process it's still active, but unresponsive. Open Activity Monitor (in the Utilities folder in /Applications), select the process relative to the app that is hang (you can search for it as shown in the image):

And Select Sample Process from the dropdown menu:

When it finishes save the file clicking on Save... and attach it to a ticket.