We have released FaceFX 2018 with x64 support. The binary file format has not changed, so you can use the 2017 and 2018 plugins and Studio interchangeably. For a list of what's new, click here.
The FaceFX Runtime 1.4 was also released, and we are putting the final touches on a new plugin for 4.20. Check the runtime-downloads page (log-in required) for details.