By purchasing a Melco license for SongKong you get:

At any time after a year you can continue to use your existing version of SongKong at no cost or for a small fee purchase another year of free version upgrades. If free version upgrades has already expired the year period starts from the day you purchase the version upgrades package, if it has not expired then it will begin once the current free version period has expired.

License Type Price Purchase
Melco License £50 ($66 USD)
Melco License (Melco N1 discount £40 ($53 USD)
 N1 Serial No:
One year of version upgrades £10 ($13 USD)

Please Read
The total price for SongKong is shown above, there are no other additional taxes.