Heya, for the downloaded windows version, it will just work. For android and web we recommend exporting your save file just to be sure. Here's a guide: https://anduogames.wordpress.com/2018/02/09/guide-to-save-files-in-third-crisis/
Thanks! I play the downloaded version and I asked because when I first launched the game after updating all my save files were gone, but they showed up again after I closed and opened the game a 2nd time. Just saying, in case that is an issue you weren't aware of, but since it isn't particularly inconvenient there's no real issue in my opinion. Thanks anyways, keep up the amazing work! <3