Open, close ad, find song, crash...

Crashes every time I try and add a song using my 6+. Tried different songs but no luck. Works on my wifes 5s but the ads sometimes cover the work place (guess she could pay the $5.99) She would give it 3 stars but Im giving the review so...

Rethinking Verizon. about Trim & Cut - Video Trimmer, Mp3 Cutter & Recoreder, v1.3