Problem with Penultimate after backup

[Unrial 0]

I've backuped my iPad with iTunes, and after having imported the backup into my new iPad, the notes of the app Penultimate have been imported to the app, the app recognize that there are some notes that have been created before the backup, it says the amount of pages that they are in the note. But when you enter to the note, the pages of the note appears in black, like a little black square. When you click into the squares, the app crashes. I don't know what to do, there are my notes from my entire university cursus.

I has no copy of the last notes in Evernote.