I dont know about ESV1, where does the Cron Password setting resides, so the best way I can tell you is through includes/settings.php
Search for "cron_pwd" text, the next value is your password. You can change it with what you want, but You have to remember to modify your cron job command to use your new password.
Ads restart should be automatic, if you configured your cronjob properly. it will be run by hosting feature something called Cron Daemon.