for HitFilm 4 Pro
This program is no longer for sale, so unless you already have a serial code you will be unable to activate. Why not try the latest version, HitFilm Pro, instead?
Firstly, uninstall any existing copies of HitFilm 4 Pro that you already have on your computer.
Click the download button below that corresponds to the operating system you are running. This will download the installer to your computer.
Run the HitFilm 4 Pro installer file on your computer by double clicking on its file icon (this requires administrator privileges on your computer). Follow the on-screen instructions to complete the installation.
HitFilm 4 Pro is now ready for you to use!