Save your money. Michael Herrick may have some personal problems as he states, but that does not excuse over 6 months of unupdated prepaid subscriptions or the many unaddressed bugs in his program (filters are basically useless).

Better yet, put your money where it will do some good. I went back to Michael Tsai's <a target="_new" href="http://www.versiontracker.com/dyn/moreinfo/macosx/16177">Spam Sieve</a>. What a difference.