Today, something crashed my AHP, so I uninstalled everything (after backing up all my .ahx files) including both folders AHP creates. I got my Active Home Pro backup disk (which has everything you need to have including the Registration code) and used the original file I got in 2005 to apply 3.271.
So far, all timers have triggered properly, I suspect if you install 3.271 over any other version, you get problems. I will monitor it to make sure all timers work correctly, if so, I'll keep it, if not, back to 3.228 I go.