Deleted most of my data!

Ive been using this app to track my periods since march and I cant see any of my data before September. Its just gone. I am really disappointed. It seems like the just want you to buy the expensive version. It wouldnt be so ridiculous if they had a warning that your data was about to expire so you could back it up. To be clear, I know this isnt the full version and I wasnt trying to edit old info, I just wanted to see what I had already entered. I will be looking for a new app to replace this one. Deleting my data is not a good strategy to gain my trust and make me want to give more money for the full version. Very disappointed!

Colorgrl about FemCal Lite, v1.9.3