Good evening.Hope this is the right place to post this question.I have just renewed my maps on my old Go710,after which, i find all my favorite destinations deleated.I have now painstakingly renewed them all.I had instaled a secutity four digit number code,which is now missing.My 710 sayes i can renew it by logging on to TT home and pressing the my tom tom 710 button.When i log on to TT Home i see no such button to press.i need help please,i have to add i'm not bright where computors are concerned and found doing a back up via windows explorer daunting to say the least and beyond me.