Okay thanks. Could you post your specs please?
You are using the latest, Beta CC? And have After Effects CC 2017 installed?
One other last ditch idea: If the app is trying to load up an old (corrupt? or out of date?) project or something, you could try to find it (usually in your Documents > Adobe folder) and rename or delete the folder to prevent it from loading it.
To get to the app prefs, open a Finder window, hold down the Option key, go to the Go pulldown menu, then choose Library. This opens your user Library folder. Navigate to the Preferences/Adobe/Character Animator folder, and then rename the Beta subfolder to something else.
Another option is to try deleting:
/Users/<user>/Library/Saved Application State/com.adobe.Character Animator.application.savedState
This is also in your user Library folder.
Do let us know if resetting the app prefs or that .savedState folder helps. Thanks.