Quote from MandulAA :

Email the Live for Speed Developers here: https://www.lfs.net/mailus

Yeah I have emailed them,but no reply lol,thanks by the way

I purchased S3 license via Paypal,and my acoount detail says I'm still demo licensed.
I have tried clicking unlock button in the game and it's still not unlocked.
Please help me,thank you so much!!