With very Windows' version of BiaB comes with a free DAW, RealBand (RB). You can bring in your song, add your click track, and still be able to generate backing tracks, i.e. you can add chords and generate songs like you can in BiaB. RB can read BiaB files so you can go back and forth between programs. You can also save you files in many different formats, including wav and MP3.

I do not use RB but many here do and have produced professional sounding songs and all will be able to help you if/when you run into trouble.

On a side note everyone here will help you.
This is the most friendly site on the web and many here have a ton of knowledge about BiaB, RB, music theory, etc and they all share their information.

My momma didn't raise a fool. And if she did it, was one of my brothers.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware