Thanks for your reply and I agree that $50 should be a nice price.
Just for your information, I am using a software called MediaMonkey for managing my music collection and it offers an annual license of $25 and a lifetime license of $50.
Hey, I really like LaunchBox and want to buy a premium license to support your great work!
The website says the license 'includes all future upgrades for one year', and I just wonder is there a lifetime license available?
Thanks.