Got a screen alert for software update for Paralla. Clicked to get the download started. Got a window that says "To continue the installation, quit the following applications" then in the window there were three instances of Parallels Virtual Machine. Two of them went away by themselves. The last one is just sitting there. Parallels Desktop…Quit Parallels Desktop doesn't do anything. Activity Monitor does not show any virtual machines running. Do you think it's safe to force quit Parallels Desktop?