My Avital Remote Start needs to be reset?

I have a 1999 Audi A6 2.4 SE. My Avital Remote Start 4500 has somehow managed to set itself to start the car at 12.05 every day! Could you possibly advise me how to reset the fob and what the button combination is to stop this from happening please.
Miss D.S.K., February 2011
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