Using the program is very easy, as all you have to do is drag the .JAR files to the window and click "Convert." Also, you can drag entire bunches of files to perform a mass conversion and save time.
Running the program is just as easy: decompress the three files in a folder and double click on the program. You don't have to install it or deal with tiresome registry processes.
JADMaker is a very useful program for mobile phone users with support for JAD games, and will open up many possibilities for you.