How do I reinstall the Adobe Lightroom OpticsPro plug-in ?

Windows

The DxO OpticsPro Lightroom plug-in can be removed from the path:

• Windows Control Panel > Program and Features > DxO OpticsPro 11 plug-in for Adobe Lightroom.

The next time you try to export from DxO OpticsPro to Lightroom, you will be prompted to install the plug-in. You should NOT run the installer manually. 

Mac

Within Lightroom:

1. Go to File > Plugin manager > Choose plugin
2. Then click View in finder
3. Delete the plugin folder

Do this for all DxO plugins, close Lightroom, and launch OpticsPro. It should prompt you to install the plugin again. If not, Choose "Export to Lightroom."