What “does not work” means? The saves should be 100% compatible. Do you get some kind of error or simply can’t find the saves when you try to load? Did you copy your whole save folder into the new release?
they automatcally moved over into this.
I never made a file 30 and I always saved in file one.Slot 30 is used for the autosave so it's not a problem. Did you copy the entire save folder from the previous version into the new one? People often try to transfer only the save files they use like 1 or 2 but the game uses global data files to track a number of variables.
If you did so and the problem still persists - send me your zipped save folder from the previous version and I'll check it out.