Hey there!
Your link doesn't work so I couldn't see what exactly went wrong, but I will give it my best shot!
It sounds like you're still able to get in-game, but just one of your files is missing, and if that is the case, then try deleting your version.txt file in your Last Moon folder. That will force the updater to re-update your game, giving you perhaps your missing file back.
If I solved the issue, please let us know so we can lock this thread! If not, please let us know as well, and maybe re-upload that image ;)
Good Luck!