Oh, relax you. I agree it sucks when updates are released where previous saves can't be imported, but this is probably one of the least egregious possible examples of that I can think of. It's a visual novel with relatively few choices, an option to skip text, and only the first chapter has been released. It will probably take you like two minutes to restore your progress. If this repeats regularly then I could see your point, but the dev has made no indication of this becoming the norm.