What you could try is the following:
- Go to SYNC 3 APIM Software (IVSU) Database - CyanLabs and search for the desired Gracenote version
- Dowload the file
- Use a exFAT USB stick (not drive/Disk), create a SyncMyRide folder in it with the downloaded file in it
- Create an autoinstall.lst file on the USB’s root with:
[SYNCGen3.0_ALL]
Item1 = FILE-NAME.TAR.GZ
Open1 = SyncMyRide\FILE-NAME.TAR.GZ
Options = Autoinstall
You can also check this thread for more information about manually installing gracenotes: Tutorial: No Gracenotes After Sync 3.4 Installation. Manual Installation Instructions