Conversion of legacy .cs files to newer formats - is it possible?

Hi all - it's a long shot but I have a legacy Captivate project from 2008 that I would really benefit from converting into a usable modern format. Sadly it seems the new version can't open the old '.cs' format files. 

Is there any way that anyone knows of converting these old files into something usable? Alternatively, because I have the flash output, is there any way of emulating their display in something that can handle the html output the way the old Flash plugin used to?