Cant export data and app crashes

Used this app for a week then tried to email myself data. "Sorry, you cant email." Hm. Ok. I did buy the app...thought that was one of the perks of paying.
Ok, so kept using, then 2 more days and the app is broken. Opens to home screen but crashes if I try to click into data entry screen. So now not only cant download data, also cant look at or add data. Was a super useful app when it worked. (Not flawless--graph of sleeping time, the only one I really care about, doesnt display correctly. Oh well. Better to create a spreadsheet and use google drive.

Lizbeen about Basic Baby Light - feed, medical log and track