The Master password and Confirm password could not take in any keyboard input after the initial installation, locally and remotely. I tried on 3 computers with the same problem. System is Win7 Pro.
You must click on the "Change password" button to enable the edit mode for these fields. By the way, in version 6.9.0.1 (currently in beta) we changed the Host settings interface and made a single and more streamlined settings window.