OKJ Docs
Go to www.openkj.org and click on the "Software" link in the top banner.
Once on the Software page, click button for your OS download under "Current stable version downloads."
Double-click the downloaded installer file, which will install OpenKJ on your PC or laptop.
Ensure that you have a songs DB folder that you can point to (such as c:\karaoke); that folder should contain all the songs you're legally allowed to play
During install of OpenKJ, you will be prompted for your song db location; once you select that folder, OpenKJ then will import links to all your songs
Choose the "SongBook" link in the top banner. Register for a SongBook account - 1st month is free. This allows you to setup venues for your karaoke hosting.