Seems like it. I tried copying in a save from the previous version and it gives me a "this save was made on a different device" message (it wasn't it was made on this same computer) and even after I confirm I want to load it, it just plants me at the main menu, so it looks like it's forcing you to start the game from the start again.
At this point I think I'll just wait until the game has been confirmed to be able to have saves carry over between updates before I think about downloading and playing again, because this is a little frustrating for a game with no real "meat" in terms of lewd content yet.
Obviously I wish good luck to the dev, though. I'm certainly interested in the concepts in the game, and I love the characters, just don't have the patience to go through everything from the start every time.