I've lost all the Dropbox context menu options in Finder after updating to Yosemite. All indications of sync status on the files in my Dropbox location are also gone. The odd thing is, those context menu options are visible, along with the sync status for each file and folder, from save and open dialogs in applications. They've only gone away from Finder windows.
How can I get sync status and Dropbox context menu items back in the main Finder window?