If you start encountering these while trying to rip something, other than potentially UMD if you have a Amp and FFMPEG setup, you should turn back and do something else. It's not work it for these files.  As far as I can tell, the ONLY software that can open Cando is a dubiously supported plugin for an Autodesk app, so good fucking luck in opening it!

Do not make my mistakes. Save your time. I beg of you.