I figured this was worth a thread of it's own.
GoPro Studio is no longer being distributed and that was the source for the Cineform codec for things outside of HitFilm like Virtualdub/Virtualdub Filtermod and Footage Studio 4k. Instead, the Cineform codec and SDK has been released as open source by GoPro and David Newman.
I would expect to see tools like Virtualdub Filtermod and FFMpeg incorporate full Cineform support in the near future so this is a good thing in the long run. In the short term though, you'll need to track down an older version of the GoPro Quik desktop (2.3) to get the codec or be adventurous and build your own from the source
This source code release includes metadata code for the 360 projection that's going to be used for the upcoming GoPro Fusion. According to GoPro, Adobe already natively supports the Fusion and the release of the Fusion will also bring the release of Fusion Studio software that syncs up with Premiere and After Effects. Since HitFilm Windows already uses the Cineform SDK, it's possible HitFilm will support the Fusion in the not too distant future as well.
Last but not least, David Newman's blog post about the open source release.