Re-registration

Just had my computer returned from repair. Want to re-install Avast Professional. Gone to http://avast.com/eng/download-avast-professional.html as given in original e-mail. Does not recognise page. What do I do? Help appreciated!

Download the new avast5 Pro Trial: http://files.avast.com/iavs5x/setup_av_pro.exe and install.

Go to www.avast.com/resend-license.php and enter your 4.8 Pro key and the email you used to register 4.8 Pro.
The license file for Version 5 will be emailed to you.
Save the attached file (license.avastlic) to disk and doubleclick it to make your Avast5 Pro Trial to a full registered version.