How to fix thumbnail preview for blend file on win7?

How to fix thumbnail preview for blend file on Windows 7?

After installing Version 2.74 the thumbnails for all 2.74 blend files shown only in the internal Blender Browser,
but no more in the Window Explorer. How can I fix that?

thanks for all help…

I am having this problem too for 2.75. It’s really annoying and in preferences I have file/show thumbnails enabled.

Works here, Blender 2.75 64bit Win 7.

Yea, I don’t understand this either. I’m sure it’s a registry key that’s missing. Do you know what key it is?

Any new advances on this?

Try this, go in blender.exe file properties and add -R.
It should fix it.