With no arguments specified, starting the FCClient application initially
only displays the main menubar.
Use the FCClient menu to navigate to Connect and to Application.
One way to set up your own icons and startup options for your clients
is to use the "Automator" application.
This allows you to run a shell script that can open the FCClient.app and
pass it the options you want.
An example shellscript command that you can specify in Automator follows:
open -a /Applications/FCClient.app --args -c <Connection> -a <Application> -p <Program>
It may be necessary to quote the <Connection> and <Application> parameters.