You may try out the trial version of the Ringtone Converter for as long as you like, but if you want access to all the features of the software you will need to purchase a license.

When you purchase you will be added to the Ringtone Converter 'members list' and be able to create an Armadillo "key" to unlock the program at

 http://www.codingworkshop.com/ringtones/members.php

This key will be valid for the current version of the Ringtone Converter.

Upgrades to future versions are also free,  so as a registered user all you need to do if you want to upgrade is to visit the url above,  download the latest version and create a new key.

Details of how to enter your registration details can be found here.