CDK stuck on Starting state when you forget to enter credentials

I added CDK using runtime detection. Then I tried to start it. First attempt failed on missing path to vagrant. I provided that and then tried to start it again. This time it complained I didn't enter the credentials. But unfortunately after this the server adapter is stuck on Starting... There is no way to press start or stop and there is no console output. I guess I either have to wait for it to time out or just restart Eclipse.