Garry Hi Garry, I noticed theres no Quit option on the menu for Windows either. You have to close the window (or use the close window shortcut as you mentioned). Most Windows apps have Quit or Exit at the bottom of the File menu.
As an aside, when replying to this post, I accidentally hit the Like link instead of Reply, and it removed tkaltschmidt's like on this post. I clicked again and tkaltschmidt's like came back.