It doesnt open

The app doesnt open a week after I bought it . I wanted to recommend this app to others but I cannot because doesnt even open. This app deserves five stars but not with this problem,all the same I still like it could you please solve my problem so that I give five stars with recommendation .May Allah solve our problems.

Ib kongoro about Dalail Ul Khirat دلائل الخیرات, v3.2