I want to install spybot free but I don't want to install the beta version until it is formally released and tested. So could you please direct me to the older version just before the beta version?

But first I have a couple of questions please:
I don't remember that when downloading spybot that it asked to backup the registry (just read that in another post). What advantage is it to backup the registry in spybot?
Second--I'm wondering if I should be accepting tea timer to run as I am running the following programs:
Avast free (right now 8 days left on a trial of Avast Security) which am thinking of abandoning the trial. Malwarebytes Pro, Windows Defender, Windows Firewall, Superantispyware. Would these programs and tea timer be in conflict?
Thanks in advance.