HTC Hero :: How To Stop Recording A Call

How do I stop my HTC Hero from recording every call? I've downloaded and installed numerous apps, and after fiddling with some my phone started doing it. I see a notice on the screen when each call begins and ends. I try to tap and catch it in order to take action, but no luck.

I see I've got Phone Recorder, but when I type my password, it says "No Data." I've also got Voice Recorder, but I don't see how it's activated to record during a call, so that's likely not it. Then there's Ultimate Voice Recorder, but its settings have "automatic phone call recording" disabled.

So what could have I done to cause my phone to record each call I make? How can I stop that from happening? And how can I erase all the recorded calls, which have got to be filling up the unit?

I'd still like to record an occasional business call for accurate info, notifying the other party of course. But I have a hunch that the recording process causes people to not hear me as clearly. At least that started happening about the time I noticed the recordings.