Did you know you can add the Quit option to the Finder’s application menu? This allows you to easily quit the application. After quitting you can restart Finder by clicking on the Finder icon in the Dock.
You can enable a the quit option by entering the following command in Terminal:
defaults write com.apple.finder QuitMenuItem -bool true; killall Finder
To revert to the original settings:
defaults write com.apple.finder QuitMenuItem -bool false; killall Finder