I've uninstalled BD but IIRC it is the same as for DD . . . =)

If you need to set your resolution manually, go to the BD install directory and find a file name config.div. Open the file with Notepad and look for the following lines –

// display width
Width 1280

// display height
Height 1024

Change the number values only to your monitor resolution. Make sure you put the right sizes in as reversing the inputs will cause problems. Save the file and restart BD. Use nominal resolutions. A res of 1366 x 768 may not allow the game to run at all, setting to 1280 x 800 will sometimes fix that particular graphics problem.