Can not connect to the Local Storage, nor via a MYSQL connection.
There is no file called 'Guardian.lock'.
After getting THE ERROR, in the Toad.log file, one may see:
PREPROCESS_EXCEPTION Error Message - Unable to connect to any of the specified MySQL hosts.
PREPROCESS_EXCEPTION Error Stack - at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
PREPROCESS_EXCEPTION Error Message - There was a connect error. Check that the username and password are correct, that you have registered this user using the registration tab, and that the registered user has not been disabled
PREPROCESS_EXCEPTION Error Stack - at Quest.Toad.CloudDB.CloudDBConnection.OpenInitialTestConnection()