Raises warning when opening kdbx file created by same version
On open, even if there were no other instances open, and only one instance trying to open the kdbx file, I get the following error:
The database you are trying to open is locked by another instance of KeePassX.
Do you want to open it anyway? Alternatively the database is opened read-only.
This db was created by 2.0 Beta 1.
Make setNativeLocks() non-fatal on OS X.