WARNING Error checking mysqldump version Error retrieving version from mysqldump.exe: mysqldump: unknown option '--no-beep' (exit 2) When i go to do a manual export from mysql database to workbench, this error occurs,  i dont know solve
--no-beep is an option for the mysql command-line query tool, not for mysqldump. 

I would guess that you have entered the no-beep in your my.cnf configuration file under the [client] section, which applies to both mysql and mysqldump clients. You need to move no-beep to the [mysql] section of the config file, so it applies only to the mysql client.