Go to your Wordpress Control Panel, click on Plugins, and then Add New.
Search for Worona, and click the Install button. You can also download the plugin here.
Once the plugin has been installed, click on Activate Plugin.
If you've already changed your permalinks configuration you're ready to go.
If your permalinks are set to default configure your them. Go to Settings > Permalinks and select the Post name option in the Common Settings.
Do not forget to click the Save Changes button in the bottom of the page!