When was the last time you played? 

• Locate the original folder: Check %LOCALAPPDATA%\..\LocalLow\Arvus Games\Starmaker Story.
• Alternative location: If the first location does not exist, try looking in %LOCALAPPDATA%\..\LocalLow\Arvus Games\. There may be a folder named Starmaker Story 1.3B for example instead.
• Back up your files: Make a copy of your save.json file and store it in a safe, separate location just in case of an error.
• Create the new folder: Manually create the full path LocalLow\Arvus Games\Starmaker Story if it does not already exist.
• Transfer the save file: Copy the save.json file from its original location (e.g., in the Starmaker Story 1.3B folder) into the newly created Starmaker Story folder.