Open your browser at the following location (If you have run the setup.exe it will have opened up the browser on this page automatically)
http://servername/installpath/anywheretogether/applications/filestogether/installation/index.php
where servername is your servers name and installpath is the location on your server of the install.
The first page we will see is the pre-installation check

We can see that the "Ion Cube Loaders" are not installed.
Click here for details on installing these loaders
There are also some other optional settings on this page. Not having these options available may cause some features of the application to fail.
When you have the loaders installed click the "Check Again"button

You will see now that the loaders are flagged as being available
Click "Next" on the screen to view the "Encoders" step