FilmConvert for Photoshop is currently only available on OSX.
It requires Photoshop version 12.0 and up, which translates to
CS5 and up. 64 bit only on OSX (10.6 +).
How to use your FKV file
Once you have purchased FilmConvert, you will be emailed a license file in the form of an FKV file.
In order to use the FKV file:
First off, you need to start up Photoshop.
Next, you will need to open the FilmConvert GUI. For instructions on how to do that, see Applying FilmConvert to your media.
Once you have access to the FilmConvert controls, you will find the Activate but above the proxy window and to the right.
Once pressed, you will be presented with a new Window, FilmConvert Product Registration.
Hit the Load License File button and browse to your FKV file.
Open it, and your plugin will be registered!