There are (at least) 2 ways of running the application:
Downloading just the application jar and relying on local dependencies means a much smaller download (about 20kb), however, it means that you have already the project dependencies locally and you know how to specify them in the command line. Pretty much, you are a power user -- and if you are power user, you quite likely know what you're doing, so I won't be going into details there. Just study the project dependency page so you know what jar's you need and use those in the classpath.
If however, you just want to download everything necessary to run this utility with the least fuss, I suggest you download the .one-jar.jar file. This is a jar file which you can execute by using: java -jar <one-jar.jar file> (rather than specifying all the other jars needed in the classpath!). Simply running the above command on the one-jar.jar file downloaded will print out the help screen -- details of the command-line switches though are presented below too.
For details on the command line arguments that this tool accepts, please visit the command line parameters page. Also I have put together the usage page with a set of envisaged usage scenarios for this tool.