Online documentation doesn’t tell where DOP presets are stored. It only point at preset folders like “key commands” and plug-in presets.
In case you wonder where this presets are stored (my Nuendo 10 didn’t import them from my Nuendo 8 installation, so I ended with no DOP presets at all), they are here:
Just copy all XML files inside that folder to:
Of course this is only valid on Windows. On Mac, I think it has a similar route, but I don’t know exactly how it goes.
Hope it helps!