DTTG crashes after syncronization and I can't open it again


I have DTTG 1.5 installed in my Ipad Air (iOS 1.8). I have syncronised 6 databases (about 2GB) without any problem from my desktop DevonThink Pro Office.

However, when I turn off my ipad and I try to use again DTTG, the app crashes sistematically and now I can not even open it. I have repeated several times the process (software instalation, database syncronization, etc.).

Any idea? Thank you

PS. By the way, RTF files still make crash the app

We are waiting for Apple to approve the update.