Here's the latest VP version Revision 434 from Koadic. He says it's likely to become 9.1.5. Specifically I'm not sure what's improved/different, but as I understand some of the newer vp9's coming out need the newer version (above 9.1.2.). He asked that I not share the dropbox link, but sharing the file was ok, so here it is. This is just the .exe, I would use the full install, then replace the .exe with this.