For additional information for upgrading to 3.0 consult following web page: Euphony 3.0 features
Upgrade to 3.0 is not mandatory. We will continue to improve and fix Euphony and will maintain two separate branches for updates. Even if you don’t upgrade, you will continue to receive updates (new releases) for your version.
If you do want to upgrade there is a process you must go through.
After update you will have v3 installed and ready!
Check Euphony Guide from Main menu to familiarize yourself will all new features.