Thanks again all who contributed their thoughts. In the end it was all painfully simple. (assuming there aren't remnants of the program that I am not aware of)

I downloaded Killbox to my desk top in preparation but didn't have to use it. I simply restarted my computer in safe mode (had never deliberately done this before so that is something I have learnt today) then went to program files and was able to delete the License_Manager directory - which I couldn't do in normal mode. I then went to Add/Remove programs and was able to remove the remaining 'link'.

I haven't had any IE script errors since rebooting, so hopefully the problem has been resolved.

Wunfluova