Auto Restart

In order for a new game to load you need to restart your server, you can automate this. The best method for this depends on your setup.

Hosted on your own PC or dedicated server

The plugin using the /restart command present in spigot to restart the server. In order for this command to work you need to configure a start script in your spigot.yml.

Using an Minecraft host with online control panel

Running scripts used by the /restart command is most likely not allowed. Therefore the only way to "restart" it is by using crash detection. The plugin will shutdown your server. Your control panel can than detect it as "crashed" and will auto restart it. If your host uses Multicraft it could already be on by default. If not you may be able to turn it on trough your control panel, if not you'll have to ask your host to turn it on for you. If your host doesn't use Multicraft contact your host.