I downloaded the save here so it's all good but believe me or not there is no app data in my folder.
That save is too old and won't work. There's been a lot of changes/updates to the code since that save was posted. As far as the AppData folder, it's hidden in C:\Users\user-account\
Ex: C:\Users\Sycho\AppData
Use the Windows + R keys to bring up a Run box. Paste this into it then click "OK" or press the Enter key:
%userprofile%\AppData\LocalLow\Faerin Games\Mystwood Manor
Put the log into a .zip, .rar or .7z before attaching it.