Agree with no restrictions on activation since the user already has a valid licence. Total machine usage limit should be sufficient if the licence is paid for, so it would not be possible to run more than three machines on the same licence at the same time, if that is what an user has. If free, the licence would be for a single user, good for 1 year and registered at only
one email address.
Process for cleaning up and fixing program errors and failures within avast should not be made more complicated than it already is when the need to resort to a clean install is called for.
Is there a workaround for this user?
[EDIT:] Since the need to re-install was caused by Safe Zone Browser not working as it should, suggest you go here to check to see if you've other issues with your system, and start a new topic here:
https://forum.avast.com/index.php?board=4.0Also attach files from the first three programs within your new topic:
https://forum.avast.com/index.php?topic=53253.0