Importing backup is Avaliable in the JIRA administration, Add-ons secntion. (Projects Administration in pre 4.0.5 versions)
Using backup Importing administrators are able to load backup to server. Import override configuration and adds not existing Scheduled Issues (Existing SI will be skipped - information about this will displays on inline dialog)
First step is to load backup file on server, you can do this by click on file input ant selecting backup file.
The next step is to select the projects for which scheduled issues should be imported.
Then all scheduled jobs should be imported
