How do you close grasshopper

Somehow I accidentally started grasshopper. How do I close it? This Grasshopper window blocks Rhino and the usual commands do not close it.

That was the first thing I tried. No response.

Hi -

Can you reproduce this issue?

Probably not. I have no idea how Grasshopper even started. I assumed that what I was seeing was the normal behavior. I had to quit Rhino entirely to get out of this.