ATM it seems that the saves cant be loaded.
Have you extracted the whole folder to there I told you to extract? just extracting the save files may not be enough as the whole folder is needed, it also seems other people didn't have problems to load it.
Just to make sure, you should extract the whole folder to : C:\Users\(your user ID)\AppData\LocalLow\480 Games
Also make sure you use the game version of 1.28.0 as it wont work with other game versions.