There is an old bug still in BIAB 2021 for Windows, (build 804) 64 bit, the latest at the time of writing this.
It locks the screen, and prevents the use of the application, which has to be shut down forcibly.

To reproduce:
-Open Band in a Box, maximize the window.
-Open the Style picker.
-Minimize the style picker *this should not be permitted*

In my Windows 10 pro, latest updates, BIAB stops responding because the minimized style picker window requires to be restored, but the main window blocks any click. Tried with the taskbar window selector, with ctrl-Tab, and many developer tricks and none works. It does not even respond to "close all windows" from the taskbar, and have to use task manager to shut down the whole application.

The solution is easy, just prevent the style picker to be minimized or maximized.

Jules DeBlu
Guitar player and producer