save button -> "save to disk" (button in save option where your normal autosaves and manual ones also appear) , download and start the newer version, click on save left sided ->"load from disk"
But keep in mind that it is never quaranteed your saves will work in those kind of games after big updates where e. g. variables have been changed. thats why creators normally use those version number systems indicating that 0.4.26f will most likely have only small changes and bugfixes compared to the e version while e.g. 0.5 would indicate some larger content changes where i as a smutty humble user would never expect my older saves to work :)