It says app is already running, but I see no big red button to stop it. I'm assuming it the 'Terminate' button. Its greyed out.

![enter image description here](https://i.stack.imgur.com/PRHtM.png)

EDIT:
screenshot after I reopened eclipse and hit big green arrow(RUN)

![enter image description here](https://i.stack.imgur.com/RFv9F.png)

And after it ran:
![enter image description here](https://i.stack.imgur.com/uYiUJ.png)

no red button while it was running.