First of all, verify that files :
- [Windows] "<instrument>.dpm" is correctly installed in "C:\Program Files\Common Files\Digidesign\DAE\Plug-Ins".
- [Mac OS X] "<instrument>.dpm" is correctly installed in "/Library/Applications Support/Digidesign/Plug-Ins/".
Check that only the latest version of the plugin is available in this folder, and that you don't have any 'arturia engine' in your plugin folder.
If the dpm files are not present, try to re-install the application from the last update installer you have downloaded (or from the CD-Rom). It is highly recommended to use the last update since it is more stable.
Launch Pro Tools, create a stereo audio track and look for the plugin in "multi-channel plugin > Instrument".
