Crashed

I loved this app from the minute I downloaded it. Im a music teacher, so I buy and use sheet music a lot. All the music Id bought online over the last couple years through my account immediately synced, and I no longer had to carry around binders full of sheet music to all my students.. yay!
However, 2 updates ago the app stopped working, wouldnt open at all, crashed every single time I clicked on it. I tried everything, including deleting and re-downloading the app.. no change.
Then the last update made it openable again, so I was stoked! I brought everything back that Id backed up on the cloud, my whole list was there again. Yay? Nope. Now I can open the app and see my list, but none of the songs will open.. the entire app crashes every time I click on any sheet music. Guess its back to binders for me.. :( But at least I can always open those!

Cryskirk about Legacy Musicnotes Viewer (Unsupported), v4.0.0