http://issues.hibernatingrhinos.com/issue/RavenDB-2997

The problem was that the old bundle name , "Periodic Backup", is written in the system database and the setting page loads the value of the active bundles from the database setting document in the system database. when the database was upgraded it introduced a "new" bundle named "Periodic Export".
The code that handles loading the bundle tabs is not aware that those are aliases.
This will cause anybody who upgrades his databases to lose sight of the Periodic Export/backup setting.
(this is a UI bug Periodic Backup should still work fine)