Sorry for the double reply! :)
It should be fixed in the new version. We've tried making the track names easier so that they're readable by any PC in any language. Still, if any other error like this appears, we'll do our best to fix it :) We're sorry for the trouble we've caused you!
If you download the new version, you can simply copy-paste your save files in the new save folder :)
If it doesn't exist/doesn't read them, you can save once in the new version and then replace the files with yours!
Of course, if any problem arises, we can always do it for you so feel free to contact us any time :D