When the Run Cleanup button is selected, and the server is running, a dialog says:

  "Squeezebox Server has to be stopped before running the cleanup.  Do you want to stop it now?"

and the buttons are Cancel and Run Cleanup.

The question might read better if it were changed so that "Run Cleanup" is a logically direct answer. I.e. this doesn't make sense:

  Q: "Do you want to stop it now?"
  A: "Run Cleanup"

And perhaps "before running the cleanup." should be cleaner:

 "before initiating cleanup.", 
 "before the cleanup process begins."
 "before I wipe your ...". :-)