I am SOOOO sorry for your data loss - most of us here in the forums seem to have at least a single layer of similar scar tissue, from losing data, to either corruption or more often a hard drive failure with no backups.
Disk drives are SOOO inexpensive these days, compared to what they were even a year or two ago, that I highly encourage you to pick up one or more additional disk drives for backup purposes, and if you can do it, I also suggest you split your Cakewalk projects and any sample libraries off to a separate drive - for performance.
I hope you are able to rebuild your lost projects to be pretty close to how the exports sound. Good luck with what sounds like a GIANT bunch of work.
Bob Bone