I’m sorry to hear you are having issues. Are you running the program downloaded from the site, or the Steam version? I only experienced it once when the Steam client seemingly crashed in the background and the program got stuck in the Processes after closing (you can check in the Task Manager after pressing Ctrl+Alt+Del).
Alternatively you can take a look at the program’s installation directory and check the logs/ folder to see if there are any .log and .dmp files. You can open the first ones in a text editor to see if there is anything else apart from “Loggin started…”, but I doubt it. If you see a .dmp file there, can you send it to us at [email protected]?
Please let us know how you get on.