Open windows pref not working?

When I quit DTPO, I would like the next launch of DTPO to open the DB that was open. Is it not working in the current betas? DTPO 2.0pb3

That’s not the function of that interface option. But if you have enabled that option and have also designated a database as default, the default database will open with the set of windows that were last open in it.

Christian has noted that a future release will relaunch with the set of databases that were last open at Quit.