Setting up a new cycle past more than 4 days from start

Hi, I set my first cycle in the monitor, however for the second one, I was just adding information about my period and did not  set up a new (my second cycle started) thinking that it will automatically remember. Now my cycle just ended, but I can not set a cycle starting at 6th January, because it past 4 days. It is too late and your brochure says wait till the next cycle!!

Could you please help me what shall I do now? We really don’t want to miss this period of ovulation- as I am 40 and trying already for two months.