fftw dll not found in published build

I'm using ArgusMagnus FFTW.NET wrapper to access the fftw library, having downloaded the package using NuGet.

It works just great in my debug sessions, and now I want to publish it using the ClickOnce from Visual Studio, as I normally do.

This seemingly publishes as normal, but none of my calls to FFTW work at all, they just throw exceptions like: Unable to load DLL 'libfftw3-3-x86': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Can anyone help me with this?

TIA