There are a few supported types to choose from. Pick the one that matches your server you wish to import.
It's time to fill in all details about your server.
A name for your server, this is only visible to you.
A unique location for your server, stored in the /servers directory.
The command used to start the server. It is tempting to change the [RAM] variable but I can only discourage you from doing so. Instead use the appropriate Server Ram setting.
The amount of memory that will be dedicated to your server.
Next click on the green folder icon in the bottom corner and browse to the location of the server you want to migrate. Select the server jar.
Before you click "Migrate" make sure that the other server is offline.
All done! Wasn't that easy?