Look in the folder you used to store the game. There should be a folder called "save" that you can copy and paste by right clicking. Paste it into the new version's overarching folder before starting the game. Alternatively, enter the save folder, copy the saves within, and paste them into the save folder of the new version, if you already started playing it and have a save folder in the new version already. Note that completed events from previous versions that have new content in the new version might cause you to miss stuff. Keep multiple saves across multiple versions in case something goes wrong so you can recover lost progress. Over many versions, you may have to start a new game eventually due to incompatibility.