I mix and record at least 2 and sometimes 4 shows a week using DC record.  At the end of the night it isn't fun for the band to wait for me to save the recordings as single channel files, it can take up to a half an hour. Last night was a good opportunity to save as a multi channel file since it is not big deal if I lose the recording.  I did, and now I can't open it with anything.  I tried Cubase on Windows, De-interleave on Mac.  I've searched this forum and can't find a solution. Can someone please give me a step by step on this. 
Thank you,
Gil