1. First find the archive location of the ruins library, C/ user/ (user name) /AppData/LocalLow/ProjectMoon/ (a string of English) /SaveData.

2. Then open a level that requires SL, and quit the game when you want to save it.

3. Secondly, copy the three files under the SaveData folder.

4. Just copy these three files and paste them back when you finally file them.