Uninstalling/reinstalling and logging off/on doesn't change your local database, which is likely where the corruption is. See if this will help you figure out the issue:
Click the sync button. It will fail, but put fresh data in the log.
Click Help|Activity log.
Can you scroll through that and see if you see any errors? You might want to copy it to Notepad or something where you can more easily search.
If that doesn't help,
go to ALL of your notes - click ALL NOTE