There is no content in my empower® library

If there is no content in your empower® library, there are several points why this may happen:

You are currently working in Offline-Mode - Please check if you are currently working in Offline-Mode -> In Offline-Mode only folders are displayed which were marked as offline folders previously. Perhaps the missing folders are not marked as offline folders.
Alternatively, it may also be possible that the offline synchronization has not been completed due to a connection issue. Please switch to Online-Mode and start the offline synchronization manually.
You are not using the full library but instead you are in the "New" presentation dialog. From here you are only able to create a new presentation and the view is filtered to only show master templates.