We recently upgraded our KServer to 6.2 and KAV to 1.3. After doing this KAV lost all of its branding. I tried using the following URL to fix it but it didn't work:
Is there something new we have to do to brand this new version of Kaspersky?
Just replace the images and any ini files that were changed. You can pull the old ini's and images from a backup of your KServer. Compare the old ini files to the newer ones and replace your customizations. I don't recommend replacing the entire ini file, because some things may have changed program-wise... just replace your customizations.
You'll have to verify the KAV install in order to push the changes to the end user.