I am getting the following error in the Episerver back office when I try and delete a content type.

The content type could not be deleted since it is in use.

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I thought the solution would be simple delete the files that are using this content type then try and delete the content type.

However when I go to the media folder I can not find these files so I can not remove them.

In addition to this error I can no longer export the websites content becuase of the same issue when I try to do so I get this error:

Exporting content 7952] Exception: Content with Guid "3a4dd7c0-563d-4160-aac8-bf4eb6e79a88" was not found[]
[Exporting content 7952] Can't export package because: Content with Guid "3a4dd7c0-563d-4160-aac8-bf4eb6e79a88" was not found

Any ideas about how to solve this? Can this be done in the database directly?

[Pasting files is not allowed]