I don’t own Dark Plant, but Triebwerk hasn’t worked for me since Cubase 6.5. No matter how many times I rescan presets, there’s only one sound, FlexPhrase Driving Queen. Clicking the left/right arrows, or the preset name show an empty window. I have 3 copies of the 700mb .vstsound file on disk, but the sounds refuse to show up in Cubase. Confirmed it’s still gone on Cubase 8.5.