After updating to Pro Tools 5.3.1 for HD (Macintosh version), DPP-1 won't...

After updating to Pro Tools 5.3.1 for HD (Macintosh version), DPP-1 won't see the text serial number authorization that was previously entered.

The original serial number authorized version of this plug-in should still be located in: Macintosh HD > Obsoleted Digidesign Software folder > DAE Folder > Plugins folder.
Move this copy of the plug-in back into the main plug-ins folder: Macintosh HD > System Folder > DAE Folder > Plug-Ins folder.
Alternately, you can choose to reinstall this plug-in from the HD|Pack Installer, but you must first remove the newer version from the Plug-Ins folder, otherwise you will end up with duplicate versions of this plug-in (and Pro Tools will still load the floppy authorized versions only).

Other Popular Articles:
• After updating to Pro Tools 5.3.1 for HD (Macintosh version), several plug-ins won't see the iLok authorization key: Focusrite d2, Maxim, and the D-Fi Bundle (LoFi, RectiFi, SciFi, and VariFi).
• Scrub trimmer moves audio out of sync.
• SampleCell II Cards with Pro Tools|HD Systems
• How to bounce individual tracks in Digital Perfomer that have Insert FX to conserve DSP.
• AES/EBU transfer from 192 I/O to TC Electronics 6000 is not working