Hello shallowfoam!
Without the logs, a video or more information I have no clue how to help you.
Please expand on your issue!
Mmm, try one of these solutions:
If it still doesn't work, a log would be useful, which can be found at: c:\Users\YourUser\AppData\Local\Changed3D\Saved\Logs\ (folder should automatically be created when trying to run the game).