Hi Greg,
I'm not part of the sellacious team, but I do use this platform.
It is still in development, I had some issues with stripe payments the other week, and they fixed it and sent me an updated version within 4 days, but for replying to the questions on here, especially pre-sales they are not so great.
I know you were asking just about when next development is going to be released, but for future, I'd advise using the little blue text message icon that appears on the bottom right to directly message them, I've usually found they're near-instant on there, even if they aren't on these forums they have made.
Cheers
Sam