Thanks for the reply Bob,
The only problem is that I cannot see where to enter the registration numbers. The gui window is not displaying properly so its hard to tell what is going on. I would upload a screenshot but its the same as the one already posted here.
If I could get the gui window to display correctly then I could use your suggestion.
I would also like to know how to remove avast from the system completely if there is no solution to this. I installed the rpm version.
Thanks again for the help.