Sorry, for the inconvenience, but because of developmental complications, importing older saves has never been possible for my game. Doing so leads to unforeseeable errors at multiple points in the game, because various aspects are adjusted under the hood. To circumvent this issue somewhat, I include multiple save files at varying points of progression to help returning players get back up to speed.
For specific save data tweaking, my patrons have access to a developer room, which contains skips to specific chapters, access to nearly all items in the game, level and gold modification, and more.