Hello, we will consider your request while we design options for stand alone Windows version.
However during our usability tests we have figured out that master password requirement alone is biggest obstacle for our users so we have took actions to get rid even that off (on Windows and until required for synchronization for instance, user of course can set it if he wants).
We are still considering options for geeks and "paranoia" users, but they will never come default and not as trade off for usability. I can imagine more complex settings with respect to locking and unlocking the app on Windows something similar we have on Mac version, but this is not a priority at the moment so I can't promise anything to be changed on Windows soon.