I just upgraded from 1Password 3 to 1Password 5, and now it won't launch. I am getting the error, "1Password failed to connect to 1Password mini". I have removed all other versions of 1password and disconnected my time machine backup. I moved the 1Password folder in ~/Library/Application Support to the desktop. I rebooted the computer several times after each change. I deleted and reinstalled 1Password several times. Activity Monitor shows no other 1Password processes running. None of these changes have made a difference.