After unpacking the tar.gz archive, you'll have to change directories in the terminal to that folder. For example if you unpack it in your Downloads folder, do this first:
cd ~/Downloads/pigeonplanner-3.6.2
Or if it's in your hopme directory:
cd ~/pigeonplanner-3.6.2
It's case-sensitive, use the tab-key for autocompletion. Then try the setup command again.