Are you sure you recorded 4 x mono, i.e. 4 individual files? If so, you should have four files like: 1.wav, 2.wav, 3.wav, 4.wav. Sounds more like you recorded 1 x 4-ch, in which case you may have scene10.bwf (if you recorded in BWF format) or scene10.wav (if WAV format), which is comprised of 4 tracks within a single WAV or BWF file.
I think Audacity can handle 1 x 4-ch, but don't recall specifically - only that I think I've done it before. I'm not at home to test myself, so I think not much more I can offer at this point.
If you've recorded BWF, I recall someone mentioning a utility previously for breaking out 4-ch BWF into individual tracks. Might even be in the "Where do I find..." thread.