Hi! Thanks for the warm feedback.
The major changes caused by the new mode and the change in the quest system forced us to reset the saves.
The following versions will support old saves.
Right now, our programmer is working on developing a system that will allow this.
(usually the problem is that the new quest is issued in the second act, and if you have already reached the third, then you will not receive it because of this, you had to start a new game)