Wont open

I had this app for a week and a half. I absolutely loved everything about it. It is a great educational tool for beginners and up to advanced levels. However, I tried to open it today and it kept crashing. I deleted and redownloaded it to no avail. When this is fixed it will be a terrific app, bit for now I cant access it.

Terrylyn about Learn French with 7 jours sur la planète