I ran into similar issues today. I cut a big chunk of text and formatting, and before I could paste it Evernote crashed, taking with it all the data. Perhaps I could have quickly pasted it into a word document, but I foolishly didn't think of that at the time (and, I'm not certain it was stored in the clipboard cache). But, I thought of this workaround, which might help others with a second device.
If you have a second device, go into it and find the old note. If Evernote properly crashed, it should still be there. Rename the title slightly so it comes as a new note. Sync.
As an extra precaution, I also emailed myself the note from my second device (a feature I'd never really noticed before).
Then, go into your first device and you should have both version of notes - the original (now re-named) and the newer one you were working on. Cut and paste (and cross fingers...) between the notes to get it to how it was meant to be.
It was probably a bit easier for me because I've set it so Evernote only syncs when I shut it down, or when I manually tell it to do so. This might not work if Evernote syncs on start-up, in which case it may over-write the note on the second device before you can access the original note.