Reinstalled windows, now i need a little help with Avast!

I reinstalled Windows 8 2 days ago and now i want my Avast Premier back becose i recently bougth it.
But the problem is that when i log in Avast register my PC as an another PC… How can i get back my Premier without having to buy it all over again?
(excuse me if bad english)

Don’t you have the License file saved anywhere?

You don’t have to pay again just to download the program, get it here http://files.avast.com/iavs5x/avast_premier_antivirus_setup.exe, but you will have to enter your license again.

Try this if you didn’t save the license.avastlic file - Resend avast License http://www.avast.com/resend-license-paid.php, you will need to enter the email that you used when purchasing the license, e.g. the one that the original email with the link was sent.