Your game may be up to date, but the updater for Last Moon can be quite.... Forgetful. It's been known to skip over files/folders which will lead to problems like these.
When you delete your version.txt, it forces an update which should (in most cases) force and update in which the updater looks for any missing files in your computer in comparison to the one that is currently on the server.
Many people have had the same problem as you, and the issue is what I described above.
So if you would please delete your version.txt, Start up LM, and let the updater do its own thing, That would be most helpful. If the problem persists, we will still help you find a way to fix it. I will even give you the folders of the two maps from my game to you if it must come to that. Until then, good luck! Keep us updated on how it goes!