Hi, I'm having a similar issue. My Evernote (PC app) had a message saying something like 'syncing' for the past week or so which I (regretably) ignored, and my computer restarted today and I cannot see any of my notes from at least the past week. Additionally, there are 4000 copies of a single note from over a week ago, which is annoying but less of an issue than the missing notes. The web version reflects the same and the missing notes are not in Trash. I am not using premium and I don't really want to upgrade just to retrieve note data, and I'm not even sure if this would fix the issue. I have messaged EvernoteHelps on twitter but haven't yet received a response, so any advice would be appreciated.
The app just upgraded to 10.29.7 upon restarting, so I assume I was running the previous version when the issue occured.