Just download the archive for your platform and deflate it into your programs folder. No further installation step will be required. The executable in the top-level directory will perform the setup when it is started the first time. There are detailed installation instructions
and a screencast video
available which support help.
You might need to install following additional Software before you start:
Attention! There are GTK compatibility issues on Linux that you might take care of. See Installation Instructions for more details.