Just updated to CC2014 and now premiere can not play any mp4/h.264 file only showing a green image. Even if you export a working clip thats a different format from premiere as h.264 and import it back in, it will only show up green. Media Encoder 2014 is also having the same issue. I've tried clearing the cache, creating a new project, restarted the pc, reinstalled the software, updated drivers... can't seem to fix it.
Here's a screenshot:
I was going to downgrade back to the previous version but the option to select which version you want to download has now either been removed or is not working on the site.