[HELP] No preview window

[Miranda]

Seems to be failing all the time, and when I try processing a ProRes file, Hybrid quits as soon as I add it.

[Selur]

Assuming you didn't add a new virus scanner or similar that is running amok,..
Try deinstalling Hybrid with settings and reinstalling it.
Also check that no global Vapoursynth is installed on your system.

[Miranda]

I've already tried re-installing twice. Windows 10 ran an update yesterday.  Could that be it?

[Selur]

Can't really say whether a Windows Update could be the culprit (not using Win10 here).
Does it change anything if you tell Hybrid to use Bestsource?

[Miranda]

Where do I find the Bestsource setting?

[Selur]

Filtering->Vapoursynth->Misc->Source has options for source filters,..

But that probably will not help if for some reason Vapoursynth itself doesn't work properly.
More likely some antivirus program or similar running amok.

[Miranda]

I just managed to load a ProRes file, but the preview window still only displays grey.

[Selur]

If you see a grey window only, keep it open, open an vsViewer through Tools->vsViewer and press F5, that hopefully shows an error message,..

[Miranda]

I haven't installled any anti-virus software.  It's a mystery.

[Selur]

Hmm,.. I have Windows Defender and Malware Bytes here, but in both I got exceptions for the Hybrid folder,...