Thank you for your help, though I think something went wrong with this.
The import didn't work and it looks like the file size is much too small (1kB). From the file name I think the wrong file may have been converted. I believe the file that needs to be converted with extracta.exe is "LAY-46370_B.brd" This brd file is 22.6MB so I imagine the resulting .alg file will be on the order of 10s of MB (if not 100s of MB).