There is no option to complete the order without creating an account.I think you can order without making an account ?
or maybe you can order here search for renew the license.
Anyway, Anti-virus4u prices are a bit high.
I have received 2 promotions delivered to my email.
1- F-Secure Safe 1D/1Y for $19.99
2- AVG Internet Security 1D/1Y for $12.99