Thats exact!
Im here from the beginning with this one, i have, yet, the 0.16 version... If i have to begin, then im sorry, but i will give up sadly, and i will wait for a definitive version. As i know this game will endure some years yet, to develop before conclusion, probably i will forget about this game in the process.
So yes, this thing about the old saves not working, IS A GAME KILLER, whatever your opinion on this.
I wish to the dev, good luck, and hope this game will have a conclusion, and dont do as others, like DarkCookie from Summertime Saga, milking the players meanwhile.
Best regards.