Hello again! We are right now working on the next version (0.5.0) that will be released through our Patreon. We don't have any ETA, but we have some time working on it and the quantity of content is quite substantial so we hope the wait is worth it!
About save files* We usually prepare a "skip to last version" option from the New Game menu on new versions, just in case older saves don't work for any given reason.