HanDBase crashes on IOS 14.6

I have just transferred HanDBase from an older IPad to an IPad Pro iOS 14.6.
There are four databases loaded. Three unencrypted databases open normally. The third encrypted database crashes. If I try to de-encrypt the database, I am told to de-encrypt the database first, but clicking on the option to de-encrypt, crashes HanDBase.
Full access is allowed on all sections of the database.
Any advice on the way forward.
There are four databases loaded. Three unencrypted databases open normally. The third encrypted database crashes. If I try to de-encrypt the database, I am told to de-encrypt the database first, but clicking on the option to de-encrypt, crashes HanDBase.
Full access is allowed on all sections of the database.
Any advice on the way forward.