Hybrid does use a portable Vapoursynth (and Python), so it should not load stuff outside that scope.
I think the problem isn't really Vapoursynth, but vsViewer.
Have you tried whether vspipe works?
Seems like vsViewer is using the wrong environment.
Does the attached vsViewer binary work?
Also try with the old, whether starting Hybrid and then Tools->vsViewer and enabling "Edit->Settings->Paths->Libraries form this list are loaded prior to Windows registry or system PATH" (and hitting apply) makes a difference.
Cu Selur
I think the problem isn't really Vapoursynth, but vsViewer.

Have you tried whether vspipe works?
Seems like vsViewer is using the wrong environment.
Does the attached vsViewer binary work?
Also try with the old, whether starting Hybrid and then Tools->vsViewer and enabling "Edit->Settings->Paths->Libraries form this list are loaded prior to Windows registry or system PATH" (and hitting apply) makes a difference.
Cu Selur
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.

