Can't restart avast free

Can someone help?

After hardware problems with my laptop was repaired, the avast license was expired.
I asked and became a new license key,… and the following instructions,…

  1. Highlight the license key above, then right-click it and select “Copy”.
  2. Open your avast! Free Antivirus controls and select the “Settings” tab.
  3. Next, click the “Registration” tab. No registration tab show up !???
  4. Click the arrow next to “Offline registration” to expand this option.
  5. Click the “Insert the license key” button.
  6. Right-click in the empty Registration box and select “Paste”.
  7. Click “OK” – your license key is now inserted and your avast! antivirus software can now be used free of charge for a further 12 months.

http://www.avast.com/faq.php?article=AVKB9#articleContent