You don't say what version of avast that you have, so I will assume it is the free version, given the topic title. Nor do you say what version number the latest version just released yesterday is avast 2014, see
http://forum.avast.com/index.php?topic=136785.0.
If you have avast 8.0.1497 latest avast 8 version, you can't re-register early. The Registration interface doesn't change until there are 28 days left of your registration remaining.
If you update from avast 8 to avast 9 (2014) using the avastUI program update it will retain the settings and registration days remaining. If you actually want to register early, you could of course download avast 2014 and do a clean install of that, you would then need to register.
