How to purchase server edition?

How to pay the $199 for server edition, where can I buy the license?

Server edition can be purchased only after you install trial version from http://www.manager.io/server/tutorials, have you managed to install it?

Good day. Id like to purchase the server edition. I already install the trial version but when i tried browsing
This site can’t be reached 127.0.0.1 refused to connect.

@MAI This is probably your firewall blocking the connection to your server. You should check if your firewall allows connections over port: 8080.