You need PMDG navigraph data. Once you have PMDG data instaled:
- copy all content from your fsx main folder/PMDG/NAVDATA to FSX/FMCWP/NavData
- copy all content from FSX/PMDG/SIDSTARS to FSX/MADDOG/SIDSTARS
Everything is set this way, but when you run Maddog Manager&Setup utility for the first time after update, you will be asked to select one option regarding new detected navigrapg cycle. Select "do nothing"