Hey guys, thats my turn!

Im using 2014.9.0.2021 Avast Free Antivirus version (190603-2 virus definitions version) on Windows SP3, my registration has expired and i cant renew it.
Any License Key available for this Version, or should i Uninstall Avast and install last version? I preferred use this old version, its a very, very old PC. W11332244H9900A0420-8MRTR8W5 does not work.
Im able to update Virus Signature, not able to update Avast to 2015.10.3.2021 though. I get a server Error.
Thank you.