Unfortunately we have not been able to push out the most recent updates to the Mac App Store due to technical problems during upload. Our application has a rather unusual large size which may be the cause of the issues in the store but we're not sure and after days of trying to re-upload it we had to give up.
For now the latest update and DLCs for Mac are only available through the Steam platform and if you contact our support and if you have a proof of purchase we can switch your product license to the Steam version (as far as I know).
