A solution for this. Quote from maksio on FA: "you need to start new game, make a save, then go into saves folder, delete the save the game made and rename the save you want to to import to whatever the deleted save was named."
It gives me TypeError, cannot read property 'length' of undefined. It's ok, I can start a new game I guess lol
Will try to fix this as soon as possible So I will probably roll out a new version the next few days.