Bought this today (see date of post). This is the dune320win-withnks.zip downloaded file.
I have Windows 10 x64 and noticed that the installer tries to put the 32 bit plugin into:
C:\Program Files\Steinberg\VSTPlugins\
before I deselected it.
It also tried to put the 64 bit plugin into:
C:\Program Files\Steinberg\VSTPlugins
- which is at least valid but the first path is the one my DAW goes to.
This is easily replicated, verified and fixed.
Great instrument BTW.