you only need to get to 0.7.5.0 to get save migrated although if that doesn't work theres a prev savesupport file on the mods discussion in the discord that would fix it for sure for 0.7.5.0
one more thing to grab old versions you need the itch.io app and you can grab older versions with that you will need to google the itch.io app though as its itch.io's most uhh poorly guarded secret
edit:https://itch.io/app