Vacancies` validity is specified when entering a date in the "Expiration date" field. After reaching the specified date, vacancies are automatically moved to the archive. Archive vacancies are not displayed in the front-end of the vacancies page, yet they are kept and are always available for editing.
You can also remove the job offer from the archive. To do this, enter a new date in the "Expiration date" and click "Restore from archive". If you specify a wrong date (that has already passed) in the "Expiration date", the vacancy will be available till the next archivation. You can set the time of daily archivation using the plugin settings page. If the "Expiration date" field is empty, the vacancy is considered to be constant.