If you are on PC/Mac, just delete the old version and play the new one. Your saves are located elsewhere, so they will persist.
If you are on Android, you need to backup your saves located at Android > data > com.mythic.manor > files > saves (just copy/move the saves folder somewhere outside of com.mythic.manor). Then uninstall the old version, then install the new version... then put the saves back where they belong