I used the screen to align the dish to the highest pitch of tone. When i went to align there was only the second tone heard when the quality was in the 75 90"s area on the next day . How would this be corrected I suspect software error the version I have is TDV10290-1-0-2-0 Is there a better version also blind scan is wacky missing certain freq that are not close together. How do you update software? as I have never done that yet.