Address book has stopped to sync Google contacts. Opening the "Preferences" freezes the app for a few minutes then the preferences windows appears. There is no option for syncing Google contacts any more. Clicking on "On My Mac" shows nothing, the right side of the window is completely blank. Clicking on "+" and adding a new account does not have any "Google" options as well. Anything I could do to solve this? Is there a way to reset Address Book or anything else? I'm running Lion, and the contacts sussed to sync well with Google in the past (across all my Apple devices).