First of all, thanks for uploading this program, I want to use a slightly old pc for hosting a minecraft server form me and my friends. One question thought: Is there any video tutorial that explain how to use that? It says "unable to access jarfile server.jar" Thanks!
-UPDATE: If you get the same error, you must drag the "server.jar" file in the same folder as the program.
If you want to include cracked-minecraft players, add this command "online-mode=false" in the server.properties file that will be created only once you started the server for the first time