I'm using Sonar X3e 64 bit in Windows 7 and trying to figure out how to get my browser back.  I inadvertently hit something on my keyboard and everything re-docked.  I had my browser set up in my 3rd monitor and it was nowhere to be found when I undocked everything.  I tried selecting the browser again from the menu and with the shortcut key and I can't get it back.  I need that for the drum loops I use and it has ground my project to a halt.  I've had this happen once before and I never could get it to work on that project again.  I ended up copying and pasting everything into a new project.  I'm guessing there is a solution that I am unaware of.

Sometimes when I have a window that disappears, I have to change my screen resolution temporarily because the window has moved off the visible area of the screen.  Once I find it this way, I drag it back into my working area and then change the screen resolution back to my original setting.

Edit: I see you did indeed try hitting B.