If you are a registered user of Audio SixPack you may upgrade at no charge to newer minor release. Just download the latest shareware release of Audio SixPack (Version must have an alike major version number as your) and install it without uninstalling the previous version (don't forget close previous version of Audio SixPack if running). This will preserve your registration. If the registration code is no longer present on your system just re-enter it like the first time and restart the program.